Grub menu does not show entries in grub.cfg

Lubuntu Support
1

Hi there!
I have just installed Lubuntu 24.04.1 LTS (Noble Numbat) on my HP8440p alongside Void, Slackware 15.0 and an older install of the same version of Lubuntu.
Grub was installed through a chroot of the newer Lubuntu (sda6), from Lubuntus live usb.
os-prober is enabled in /etc/default/grub (below) and I did run

update-grub

grub.cfg has entries for void, but no entries for Slackware and the older Lubuntu (sda1), which does not surprise me in the case of Slackware as this has happened with Slackware under Grub installed by other distros in other machines too.
But GRUB menu shows neither Void, nor Lubuntu in sda1, nor, of course, Slackware when I start the machine.
I am completely lost here.
Some info:

 lsblk -f
    NAME FSTYPE FSVER LABEL     UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
    loop0
                                                                           0   100% /snap/bare/5
    loop1
                                                                           0   100% /snap/core22/1722
    loop2
                                                                           0   100% /snap/firefox/5561
    loop3
                                                                           0   100% /snap/gnome-42-2204/176
    loop4
                                                                           0   100% /snap/gtk-common-themes/1535
    loop5
                                                                           0   100% /snap/snapd/23258
    sda                                                                             
    ├─sda1
    │    ext4   1.0   LubNN2404 9aaa63f3-c9b5-4610-901e-80c6524dccea                
    ├─sda2
    │    ext4   1.0   VOID      ebba53a5-a6d2-4703-a994-8b24f9d2f832                
    ├─sda3
    │    swap   1     swap      9e93d494-3ecc-462c-a071-1311aa90f61f                
    ├─sda4
    │                                                                               
    ├─sda5
    │    ext4   1.0   Slack15   89f1e4d4-2b56-431c-8555-42192220a77a                
    └─sda6
         ext4   1.0   lubuntu   59fe58a6-6a05-41ab-bfe3-24fc71b05053   27,1G    25% /
    sr0     

/etc/default/grub says:

    # If you change this file, run 'update-grub' afterwards to update
    # /boot/grub/grub.cfg.
    # For full documentation of the options in this file, see:
    #   info -f grub -n 'Simple configuration'

    GRUB_DEFAULT=0
    GRUB_TIMEOUT_STYLE=hidden
    GRUB_TIMEOUT=-1
    GRUB_DISTRIBUTOR='Ubuntu'
    GRUB_CMDLINE_LINUX_DEFAULT='quiet splash'
    GRUB_CMDLINE_LINUX=""

    # If your computer has multiple operating systems installed, then you
    # probably want to run os-prober. However, if your computer is a host
    # for guest OSes installed via LVM or raw disk devices, running
    # os-prober can cause damage to those guest OSes as it mounts
    # filesystems to look for things.
    #GRUB_DISABLE_OS_PROBER=false

    # Uncomment to enable BadRAM filtering, modify to suit your needs
    # This works with Linux (no patch required) and with any kernel that obtains
    # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
    #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

    # Uncomment to disable graphical terminal
    #GRUB_TERMINAL=console

    # The resolution used on graphical terminal
    # note that you can use only modes which your graphic card supports via VBE
    # you can see them in real GRUB with the command `vbeinfo'
    #GRUB_GFXMODE=640x480

    # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
    #GRUB_DISABLE_LINUX_UUID=true

    # Uncomment to disable generation of recovery mode menu entries
    #GRUB_DISABLE_RECOVERY="true"

    # Uncomment to get a beep at grub start
    #GRUB_INIT_TUNE="480 440 1"

    #jan_8_2005:
    GRUB_DISABLE_OS_PROBER="false"

grub.cfg says:

    #
    # DO NOT EDIT THIS FILE
    #
    # It is automatically generated by grub-mkconfig using templates
    # from /etc/grub.d and settings from /etc/default/grub
    #

    ### BEGIN /etc/grub.d/00_header ###
    if [ -s $prefix/grubenv ]; then
      set have_grubenv=true
      load_env
    fi
    if [ "${initrdfail}" = 2 ]; then
       set initrdfail=
    elif [ "${initrdfail}" = 1 ]; then
       set next_entry="${prev_entry}"
       set prev_entry=
       save_env prev_entry
       if [ "${next_entry}" ]; then
          set initrdfail=2
       fi
    fi
    if [ "${next_entry}" ] ; then
       set default="${next_entry}"
       set next_entry=
       save_env next_entry
       set boot_once=true
    else
       set default="0"
    fi

    if [ x"${feature_menuentry_id}" = xy ]; then
      menuentry_id_option="--id"
    else
      menuentry_id_option=""
    fi

    export menuentry_id_option

    if [ "${prev_saved_entry}" ]; then
      set saved_entry="${prev_saved_entry}"
      save_env saved_entry
      set prev_saved_entry=
      save_env prev_saved_entry
      set boot_once=true
    fi

    function savedefault {
      if [ -z "${boot_once}" ]; then
        saved_entry="${chosen}"
        save_env saved_entry
      fi
    }
    function initrdfail {
        if [ -n "${have_grubenv}" ]; then if [ -n "${partuuid}" ]; then
          if [ -z "${initrdfail}" ]; then
            set initrdfail=1
            if [ -n "${boot_once}" ]; then
              set prev_entry="${default}"
              save_env prev_entry
            fi
          fi
          save_env initrdfail
        fi; fi
    }
    function recordfail {
      set recordfail=1
      if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
    }
    function load_video {
      if [ x$feature_all_video_module = xy ]; then
        insmod all_video
      else
        insmod efi_gop
        insmod efi_uga
        insmod ieee1275_fb
        insmod vbe
        insmod vga
        insmod video_bochs
        insmod video_cirrus
      fi
    }

    if [ x$feature_default_font_path = xy ] ; then
       font=unicode
    else
    insmod part_gpt
    insmod ext2
    set root='hd0,gpt6'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
    else
      search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
    fi
        font="/usr/share/grub/unicode.pf2"
    fi

    if loadfont $font ; then
      set gfxmode=auto
      load_video
      insmod gfxterm
      set locale_dir=$prefix/locale
      set lang=sv_SE
      insmod gettext
    fi
    terminal_output gfxterm
    insmod part_gpt
    insmod ext2
    set root='hd0,gpt6'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
    else
      search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
    fi
    insmod gfxmenu
    insmod png
    set theme=($root)/usr/share/grub/themes/lubuntu-grub-theme/theme.txt
    export theme
    if [ "${recordfail}" = 1 ] ; then
      set timeout=30
    else
      if [ x$feature_timeout_style = xy ] ; then
        set timeout_style=hidden
        set timeout=-1
      # Fallback hidden-timeout code in case the timeout_style feature is
      # unavailable.
      elif sleep --interruptible -1 ; then
        set timeout=0
      fi
    fi
    ### END /etc/grub.d/00_header ###

    ### BEGIN /etc/grub.d/05_debian_theme ###
    set menu_color_normal=white/black
    set menu_color_highlight=black/light-gray
    ### END /etc/grub.d/05_debian_theme ###

    ### BEGIN /etc/grub.d/10_linux ###
    function gfxmode {
        set gfxpayload="${1}"
        if [ "${1}" = "keep" ]; then
            set vt_handoff=vt.handoff=7
        else
            set vt_handoff=
        fi
    }
    if [ "${recordfail}" != 1 ]; then
      if [ -e ${prefix}/gfxblacklist.txt ]; then
        if [ ${grub_platform} != pc ]; then
          set linux_gfx_mode=keep
        elif hwmatch ${prefix}/gfxblacklist.txt 3; then
          if [ ${match} = 0 ]; then
            set linux_gfx_mode=keep
          else
            set linux_gfx_mode=text
          fi
        else
          set linux_gfx_mode=text
        fi
      else
        set linux_gfx_mode=keep
      fi
    else
      set linux_gfx_mode=text
    fi
    export linux_gfx_mode
    menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
        else
          search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
        fi
        linux    /boot/vmlinuz-6.8.0-51-generic root=UUID=59fe58a6-6a05-41ab-bfe3-24fc71b05053 ro  quiet splash $vt_handoff
        initrd    /boot/initrd.img-6.8.0-51-generic
    }
    submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
        menuentry 'Ubuntu, with Linux 6.8.0-51-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.8.0-51-generic-advanced-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
            recordfail
            load_video
            gfxmode $linux_gfx_mode
            insmod gzio
            if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt6'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
            else
              search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
            fi
            echo    'Loading Linux 6.8.0-51-generic ...'
            linux    /boot/vmlinuz-6.8.0-51-generic root=UUID=59fe58a6-6a05-41ab-bfe3-24fc71b05053 ro  quiet splash $vt_handoff
            echo    'Loading initial ramdisk ...'
            initrd    /boot/initrd.img-6.8.0-51-generic
        }
        menuentry 'Ubuntu, with Linux 6.8.0-51-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.8.0-51-generic-recovery-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
            recordfail
            load_video
            insmod gzio
            if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt6'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
            else
              search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
            fi
            echo    'Loading Linux 6.8.0-51-generic ...'
            linux    /boot/vmlinuz-6.8.0-51-generic root=UUID=59fe58a6-6a05-41ab-bfe3-24fc71b05053 ro recovery nomodeset dis_ucode_ldr
            echo    'Loading initial ramdisk ...'
            initrd    /boot/initrd.img-6.8.0-51-generic
        }
        menuentry 'Ubuntu, with Linux 6.8.0-49-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.8.0-49-generic-advanced-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
            recordfail
            load_video
            gfxmode $linux_gfx_mode
            insmod gzio
            if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt6'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
            else
              search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
            fi
            echo    'Loading Linux 6.8.0-49-generic ...'
            linux    /boot/vmlinuz-6.8.0-49-generic root=UUID=59fe58a6-6a05-41ab-bfe3-24fc71b05053 ro  quiet splash $vt_handoff
            echo    'Loading initial ramdisk ...'
            initrd    /boot/initrd.img-6.8.0-49-generic
        }
        menuentry 'Ubuntu, with Linux 6.8.0-49-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.8.0-49-generic-recovery-59fe58a6-6a05-41ab-bfe3-24fc71b05053' {
            recordfail
            load_video
            insmod gzio
            if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt6'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
            else
              search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
            fi
            echo    'Loading Linux 6.8.0-49-generic ...'
            linux    /boot/vmlinuz-6.8.0-49-generic root=UUID=59fe58a6-6a05-41ab-bfe3-24fc71b05053 ro recovery nomodeset dis_ucode_ldr
            echo    'Loading initial ramdisk ...'
            initrd    /boot/initrd.img-6.8.0-49-generic
        }
    }

    ### END /etc/grub.d/10_linux ###

    ### BEGIN /etc/grub.d/10_linux_zfs ###
    ### END /etc/grub.d/10_linux_zfs ###

    ### BEGIN /etc/grub.d/20_linux_xen ###

    ### END /etc/grub.d/20_linux_xen ###

    ### BEGIN /etc/grub.d/20_memtest86+ ###
    menuentry "Memory test (memtest86+x64.bin)" --class memtest $menuentry_id_option 'memtest86+' {
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
        else
          search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
        fi
            linux    /boot/memtest86+x64.bin
    }
    menuentry 'Memory test (memtest86+x64.bin, serial console)' --class memtest $menuentry_id_option 'memtest86+-serial' {
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt6'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6  59fe58a6-6a05-41ab-bfe3-24fc71b05053
        else
          search --no-floppy --fs-uuid --set=root 59fe58a6-6a05-41ab-bfe3-24fc71b05053
        fi
            linux    /boot/memtest86+x64.bin console=ttyS0,115200
    }
    ### END /etc/grub.d/20_memtest86+ ###

    ### BEGIN /etc/grub.d/25_bli ###
    if [ "$grub_platform" = "efi" ]; then
      insmod bli
    fi
    ### END /etc/grub.d/25_bli ###

    ### BEGIN /etc/grub.d/30_os-prober ###

    menuentry 'Void Linux (on /dev/sda2)' --class void --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt2'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
        else
          search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
        fi
        linux /boot/vmlinuz-6.6.63_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro loglevel=4
        initrd /boot/initramfs-6.6.63_1.img
    }
    submenu 'Advanced options for Void Linux (on /dev/sda2)' $menuentry_id_option 'osprober-gnulinux-advanced-ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
        menuentry 'Void GNU/Linux (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.63_1--ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
            else
              search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
            fi
            linux /boot/vmlinuz-6.6.63_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro loglevel=4
            initrd /boot/initramfs-6.6.63_1.img
        }
        menuentry 'Void GNU/Linux, with Linux 6.6.63_1 (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.63_1--ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
            else
              search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
            fi
            linux /boot/vmlinuz-6.6.63_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro loglevel=4
            initrd /boot/initramfs-6.6.63_1.img
        }
        menuentry 'Void GNU/Linux, with Linux 6.6.63_1 (recovery mode) (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.63_1-root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro single-ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
            else
              search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
            fi
            linux /boot/vmlinuz-6.6.63_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro single
            initrd /boot/initramfs-6.6.63_1.img
        }
        menuentry 'Void GNU/Linux, with Linux 6.6.62_1 (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62_1--ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
            else
              search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
            fi
            linux /boot/vmlinuz-6.6.62_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro loglevel=4
            initrd /boot/initramfs-6.6.62_1.img
        }
        menuentry 'Void GNU/Linux, with Linux 6.6.62_1 (recovery mode) (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-6.6.62_1-root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro single-ebba53a5-a6d2-4703-a994-8b24f9d2f832' {
            insmod part_gpt
            insmod ext2
            set root='hd0,gpt2'
            if [ x$feature_platform_search_hint = xy ]; then
              search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  ebba53a5-a6d2-4703-a994-8b24f9d2f832
            else
              search --no-floppy --fs-uuid --set=root ebba53a5-a6d2-4703-a994-8b24f9d2f832
            fi
            linux /boot/vmlinuz-6.6.62_1 root=UUID=ebba53a5-a6d2-4703-a994-8b24f9d2f832 ro single
            initrd /boot/initramfs-6.6.62_1.img
        }
    }

    set timeout_style=menu
    if [ "${timeout}" = 0 ]; then
      set timeout=10
    fi
    ### END /etc/grub.d/30_os-prober ###

    ### BEGIN /etc/grub.d/30_uefi-firmware ###
    if [ "$grub_platform" = "efi" ]; then
        fwsetup --is-supported
        if [ "$?" = 0 ]; then
            menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
                fwsetup
            }
        fi
    fi
    ### END /etc/grub.d/30_uefi-firmware ###

    ### BEGIN /etc/grub.d/35_fwupd ###
    ### END /etc/grub.d/35_fwupd ###

    ### BEGIN /etc/grub.d/40_custom ###
    # This file provides an easy way to add custom menu entries.  Simply type the
    # menu entries you want to add after this comment.  Be careful not to change
    # the 'exec tail' line above.
    ### END /etc/grub.d/40_custom ###

    ### BEGIN /etc/grub.d/41_custom ###
    if [ -f  ${config_directory}/custom.cfg ]; then
      source ${config_directory}/custom.cfg
    elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
      source $prefix/custom.cfg
    fi
    ### END /etc/grub.d/41_custom ###

lubuntu@lubuntu:~$ sudo uname -a
Linux lubuntu 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug  2 20:41:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

lubuntu@lubuntu:~$ sudo inxi -a
CPU: dual core Intel Core i5 M 560 (-MT MCP-)
speed/min/max: 1199/1199/2667 MHz
Kernel: 6.8.0-41-generic x86_64 Up: 2d 3h 36m
Mem: 3.85/7.55 GiB (51.0%)
Storage: 480.08 GiB (2.7% used) Procs: 245
Shell: Sudo 1.9.15p5 inxi: 3.3.34
2

I really hope for you that someone here is able to help you with your problem. Yet another edge case in this forum. It is very specific for your needs and it is not a general Lubuntu problem. Hard to reproduce (and understand maybe), and perhaps hard to solve too from a distance.

Anyway, if you do succeed to get things up and running, good for you.

If not, perhaps should save all your documents (from the various systems) to external storage, and just install one host system. The one you like the most, or trust the most, or is cutting edge, or whatever. It is up to you.

Then, considering your PC is beefy enough, you can run any other OS you like simultaneously with the host as a virtual machine, using virt-manager. Please do not be tempted to use VirtualBox or the Gnome Boxes solution.

VirtualBox may be easier to install and perhaps also easier to use, and is certainly visually more appealing, but it is using other technology and it is inherently remarkable slower.

You will be amazed with the possibilities of running another system sideways on your host. When you use virt-manager you should not experience any speed difference at all (when you do not use the VM for gaming which requires the dedicated hardware graphics card and not an emulated one). In specific cases you should also be able to directly control a graphics card from the VM without using an emulated card (although a bit more technical challenging).

Another big advantage of using VMs instead of multi-booting, is that you do not have to switch from one system to the other (rebooting into another system that is). There are several solutions for this (mapping drives, network).

Sorry that I can’t help you, but perhaps I gave you (and others) a good idea. I still need to use W10 a few times a year for some banal application, which has not been ported to Linux, and it works perfectly for me inside my Linux host.

Installation of virt-manager is straightforward, if you follow the guidelines (it requires a little more than just $ sudo apt install virt-manager).

1 Like
3

@ Fritz: Thank you for your instructive answer. I have always avoided going into the world of containers and VM. Probably because most of my machines are quite old and not very powerful .

Your answer has given me some insight into VM and I will certainly be inclined to try it, when I have a chance. Time is a big question in my life.

I am not any data expert or prof, I am just a curious person who uses computer for many different ends, among them amateur music and graphics home production. I have been multibooting in all my machines for more than 10 years and although sometimes it is morecomplicated than I wished, I always learn useful stuff in the process of solving it.

This machine has been multibooting for at least 5 years. I suspect it may have some problem in the mothercard, probably where grub and booting are started/processed. This is just an intuitive hunch from the error messages i have got the last few months when booting. I thought of buying a new disk, may do it now before considering VM. But I will surely keep your consel in mind !

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4

You are currently using an interesting combination of OS’es. From the point of view of the general application user, there will not be many differences running things lik e.g. Rosegarden on them.

Under the bonnet are considerable differences. Before I got myself acquainted with systemd as the system and service manager I was very suspicious about the need and efficiency of “yet another wrapper” (to say the least). I now consider systemd as one of the great improvements of Linux in the last 15-20 years.

Because my time is limited too like yourself, I decided to focus only on systemd based systems. This rules out Slackware (which I used to use when it was introduced) and Void Linux too.

Unfortunately, I can’t help you with those systems. However, I’m intrigued by Void because it is a rolling release distribution and has an interesting package manager. The former assures that you can use very recent versions of applications far more quickly than on Slackware, Debian or even Ubuntu/Lubuntu. Perhaps that is why you are using it, to be able to use new releases of Rosegarden as they come out.

I will give Void a try soon, and perhaps the lack of systemd and using Runit will turn out to be very refreshing again :stuck_out_tongue:

I still use Lubuntu on my desktop, but moved on to Arch Linux (with LXQt) on my laptop (rolling release, systemd, and very good documentation). I think Arch would be a good choice of OS for you too. See e.g.: Rosegarden - ArchWiki, click around a bit, search for your favourite software, and enjoy the quality of the information to be found.

If you need any help on deploying VM’s with virt-manager (Qemu/KVM), please PM me, or just ask here. Perhaps it will be a good idea to just install Arch and LXQt on that new hard disk that you will buy, and see what happens :slight_smile: Again, ask for help if needed.

1 Like
6

Thanks for your comments. My combination of OSes iis a result of my limited understanding og data matters and computers. With the (many) years of using them, mostly on my leisure time ( I did always used tehm at work, but just plauin simple stuff for the most and mostly employer’s Windows, never a good experience. I started on y own with Macintoshes and all the way to some Lion On OSX, but then got frustrated by Apples evolution.

I am happy with Linux, great respect for MInt which was my intro for uite a few years, and then Gentoo Which I only managed to install once, although I tried in several different machines for some years. After that I never gathered the courage to try Arch and then I heard about systemd and found Artix which I have used intensively the last few years.

Slackware is still my absolute preference for music production I would love to use it everyday but Artix has been effective and easier for my most common use outside music and graphics,

I came into void just as one of the explorations i do when I find an appealing distro, I really like it, but I still have to gain more experience on it before i can rely on it as I do on Artix. I try many things. I loved Funtoo, and I keep an eye on Maccaronis development, and when I say that it strikes me the the OS f my dreams was really Sabayon, I must gain some insight on systemd.

I must say that when I installed Lubuntu on a Windows dependent friend’s old (think was an ex_XP) machine I was impressed by the result, which was what started me experimenting with lubuntu in my older machines to beguin with, and I think I will keep it around for many special situations.