Screen saver shows my desktop before login

When I leave my notebook unattended, the screen saver (xscreensaver 5.42 [28-Dec-2018]) starts and shows nice lines and colors (flurry option). Similarly, when I close the lid the computer goes standby.

When coming back from both states, the screen becomes black and the login dialog appears. The problem is that there is a 1-2 seconds period before the login dialog, during which one can see what was going on before the lock was activated. For example if I was checking my emails before closing the lid, then you can see my inbox during 1 second before the screen becomes black and the login dialog appears. If I was watching a picture before the screen saver activated, then you can see the picture before the screen becomes black and the unlock dialog appear.

I am pretty sure this is not the intended situation, as it kind of defeats the purpose of having a login screen when coming back from standby/unattended, right?

Below my data in case it’s needed.
cheers

Output of lsb_release -a:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.4 LTS
Release:        20.04
Codename:       focal

Output of lshw:

user00-pc                   
    description: Notebook
    product: X555LAB (ASUS-NotebookSKU)
    vendor: ASUSTeK COMPUTER INC.
    version: 1.0
    serial: G1N0GP000306044
    width: 64 bits
    capabilities: smbios-2.8 dmi-2.8 smp vsyscall32
    configuration: boot=normal chassis=notebook family=X sku=ASUS-NotebookSKU uuid=309B9007-094D-E581-37BF-305A3AEA5F63
  *-core
       description: Motherboard
       product: X555LAB
       vendor: ASUSTeK COMPUTER INC.
       physical id: 0
       version: 1.0
       serial: BSN12345678901234567
       slot: MIDDLE
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: X555LAB.503
          date: 08/04/2015
          size: 64KiB
          capacity: 6464KiB
          capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification uefi
     *-cache:0
          description: L1 cache
          physical id: d
          slot: L1 Cache
          size: 32KiB
          capacity: 32KiB
          capabilities: synchronous internal write-back data
          configuration: level=1
     *-cache:1
          description: L1 cache
          physical id: e
          slot: L1 Cache
          size: 32KiB
          capacity: 32KiB
          capabilities: synchronous internal write-back instruction
          configuration: level=1
     *-cache:2
          description: L2 cache
          physical id: f
          slot: L2 Cache
          size: 256KiB
          capacity: 256KiB
          capabilities: synchronous internal write-back unified
          configuration: level=2
     *-cache:3
          description: L3 cache
          physical id: 10
          slot: L3 Cache
          size: 3MiB
          capacity: 3MiB
          capabilities: synchronous internal write-back unified
          configuration: level=3
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
          vendor: Intel Corp.
          physical id: 11
          bus info: cpu@0
          version: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
          serial: NULL
          slot: SOCKET 0
          size: 2083MHz
          capacity: 2700MHz
          width: 64 bits
          clock: 100MHz
          capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap intel_pt xsaveopt dtherm ida arat pln pts md_clear flush_l1d cpufreq
          configuration: cores=2 enabledcores=2 threads=4
     *-memory
          description: System Memory
          physical id: 13
          slot: System board or motherboard
          size: 8GiB
        *-bank:0
             description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
             product: 8KTF51264HZ-1G6N1
             vendor: Micron
             physical id: 0
             serial: 00000000
             slot: ChannelA-DIMM0
             size: 4GiB
             width: 64 bits
             clock: 1600MHz (0.6ns)
        *-bank:1
             description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
             product: 99U5469-045.A00LF
             vendor: Kingston
             physical id: 1
             serial: 611055CD
             slot: ChannelB-DIMM0
             size: 4GiB
             width: 64 bits
             clock: 1600MHz (0.6ns)
     *-pci
          description: Host bridge
          product: Broadwell-U Host Bridge -OPI
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 09
          width: 32 bits
          clock: 33MHz
          configuration: driver=bdw_uncore
          resources: irq:0
        *-display
             description: VGA compatible controller
             product: HD Graphics 5500
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 09
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:48 memory:b1000000-b1ffffff memory:c0000000-cfffffff ioport:4000(size=64) memory:c0000-dffff
        *-multimedia:0
             description: Audio device
             product: Broadwell-U Audio Controller
             vendor: Intel Corporation
             physical id: 3
             bus info: pci@0000:00:03.0
             version: 09
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:51 memory:b221c000-b221ffff
        *-generic:0
             description: Signal processing controller
             product: Broadwell-U Processor Thermal Subsystem
             vendor: Intel Corporation
             physical id: 4
             bus info: pci@0000:00:04.0
             version: 09
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm bus_master cap_list
             configuration: driver=proc_thermal latency=0
             resources: irq:16 memory:b2210000-b2217fff
        *-usb
             description: USB controller
             product: Wildcat Point-LP USB xHCI Controller
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: irq:45 memory:b2200000-b220ffff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 5.4.0-117-generic xhci-hcd
                physical id: 0
                bus info: usb@1
                logical name: usb1
                version: 5.04
                capabilities: usb-2.00
                configuration: driver=hub slots=11 speed=480Mbit/s
              *-usb:0
                   description: Mouse
                   product: USB Optical Mouse
                   vendor: Logitech
                   physical id: 1
                   bus info: usb@1:1
                   version: 72.00
                   capabilities: usb-2.00
                   configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
              *-usb:1
                   description: Video
                   product: USB Camera
                   vendor: 04081-0005360015251013350
                   physical id: 5
                   bus info: usb@1:5
                   version: 0.12
                   serial: 200901010001
                   capabilities: usb-2.00
                   configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
              *-usb:2
                   description: Generic USB device
                   product: BCM43142A0
                   vendor: Broadcom Corp
                   physical id: 6
                   bus info: usb@1:6
                   version: 1.12
                   serial: ACE0105CA186
                   capabilities: usb-2.00
                   configuration: driver=btusb speed=12Mbit/s
              *-usb:3
                   description: Generic USB device
                   product: USB2.0-CRW
                   vendor: Generic
                   physical id: 8
                   bus info: usb@1:8
                   version: 39.60
                   serial: 20100201396000000
                   capabilities: usb-2.00
                   configuration: driver=rtsx_usb maxpower=500mA speed=480Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 5.4.0-117-generic xhci-hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 5.04
                capabilities: usb-3.00
                configuration: driver=hub slots=4 speed=5000Mbit/s
        *-communication
             description: Communication controller
             product: Wildcat Point-LP MEI Controller #1
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: irq:49 memory:b2224000-b222401f
        *-multimedia:1
             description: Audio device
             product: Wildcat Point-LP High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=snd_hda_intel latency=32
             resources: irq:50 memory:b2218000-b221bfff
        *-pci:0
             description: PCI bridge
             product: Wildcat Point-LP PCI Express Root Port #1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: e3
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:42
        *-pci:1
             description: PCI bridge
             product: Wildcat Point-LP PCI Express Root Port #3
             vendor: Intel Corporation
             physical id: 1c.2
             bus info: pci@0000:00:1c.2
             version: e3
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:43 ioport:3000(size=4096) memory:b2100000-b21fffff
           *-network
                description: Ethernet interface
                product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: enp2s0
                version: 10
                serial: 30:5a:3a:ea:5f:63
                size: 1Gbit/s
                capacity: 1Gbit/s
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
                configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.0.17 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
                resources: irq:18 ioport:3000(size=256) memory:b2104000-b2104fff memory:b2100000-b2103fff
        *-pci:2
             description: PCI bridge
             product: Wildcat Point-LP PCI Express Root Port #4
             vendor: Intel Corporation
             physical id: 1c.3
             bus info: pci@0000:00:1c.3
             version: e3
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:44 memory:b2000000-b20fffff
           *-network DISABLED
                description: Wireless interface
                product: BCM43142 802.11b/g/n
                vendor: Broadcom Inc. and subsidiaries
                physical id: 0
                bus info: pci@0000:03:00.0
                logical name: wlp3s0
                version: 01
                serial: ac:e0:10:c2:26:9c
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
                resources: irq:19 memory:b2000000-b2007fff
        *-isa
             description: ISA bridge
             product: Wildcat Point-LP LPC Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master cap_list
             configuration: driver=lpc_ich latency=0
             resources: irq:0
        *-sata
             description: SATA controller
             product: Wildcat Point-LP SATA Controller [AHCI Mode]
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             version: 03
             width: 32 bits
             clock: 66MHz
             capabilities: sata msi pm ahci_1.0 bus_master cap_list
             configuration: driver=ahci latency=0
             resources: irq:46 ioport:40b0(size=8) ioport:40a0(size=4) ioport:4090(size=8) ioport:4080(size=4) ioport:4060(size=32) memory:b2222000-b22227ff
        *-serial
             description: SMBus
             product: Wildcat Point-LP SMBus Controller
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 03
             width: 64 bits
             clock: 33MHz
             configuration: driver=i801_smbus latency=0
             resources: irq:22 memory:b2221000-b22210ff ioport:4040(size=32)
        *-generic:1
             description: Signal processing controller
             product: Wildcat Point-LP Thermal Management Controller
             vendor: Intel Corporation
             physical id: 1f.6
             bus info: pci@0000:00:1f.6
             version: 03
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=intel_pch_thermal latency=0
             resources: irq:22 memory:b2220000-b2220fff
     *-pnp00:00
          product: PnP device PNP0c02
          physical id: 1
          capabilities: pnp
          configuration: driver=system
     *-pnp00:01
          product: PnP device ETD0108
          physical id: 2
          capabilities: pnp
          configuration: driver=i8042 aux
     *-pnp00:02
          product: PnP device ATK3001
          physical id: 3
          capabilities: pnp
          configuration: driver=i8042 kbd
     *-pnp00:03
          product: PnP device PNP0c02
          physical id: 4
          capabilities: pnp
          configuration: driver=system
     *-pnp00:04
          product: PnP device PNP0b00
          physical id: 5
          capabilities: pnp
          configuration: driver=rtc_cmos
     *-pnp00:05
          product: PnP device INT3f0d
          physical id: 6
          capabilities: pnp
          configuration: driver=system
     *-pnp00:06
          product: PnP device PNP0c02
          physical id: 7
          capabilities: pnp
          configuration: driver=system
     *-pnp00:07
          product: PnP device PNP0c02
          physical id: 8
          capabilities: pnp
          configuration: driver=system
     *-scsi:0
          physical id: 9
          logical name: scsi0
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: ST1000LM024 HN-M
             physical id: 0.0.0
             bus info: scsi@0:0.0.0
             logical name: /dev/sda
             version: 0001
             serial: S32XJ9EG926473
             size: 931GiB (1TB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=63f35bc3
           *-volume:0
                description: EXT4 volume
                vendor: Linux
                physical id: 1
                bus info: scsi@0:0.0.0,1
                logical name: /dev/sda1
                logical name: /media/user00/r.linux.HDD
                version: 1.0
                serial: 20e5d70f-3982-482d-a9eb-3dfeaf8f6fd7
                size: 141GiB
                capacity: 141GiB
                capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
                configuration: created=2019-12-09 14:40:04 filesystem=ext4 label=r.linux.HDD lastmountpoint=/media/user00/r.linux.HDD modified=2022-06-10 09:17:16 mount.fstype=ext4 mount.options=rw,noatime mounted=2022-06-10 09:17:16 state=mounted
           *-volume:1
                description: EXT4 volume
                vendor: Linux
                physical id: 2
                bus info: scsi@0:0.0.0,2
                logical name: /dev/sda2
                logical name: /media/user00/r.all
                version: 1.0
                serial: 96782954-2c88-4c7a-87d1-f42396d80456
                size: 789GiB
                capacity: 789GiB
                capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
                configuration: created=2019-03-10 22:04:31 filesystem=ext4 label=r.all lastmountpoint=/media/user00/r.all modified=2022-06-10 09:17:16 mount.fstype=ext4 mount.options=rw,noatime mounted=2022-06-10 09:17:16 state=mounted
     *-scsi:1
          physical id: a
          logical name: scsi1
          capabilities: emulated
        *-disk
             description: ATA Disk
             product: WDC WDS240G2G0A-
             vendor: Western Digital
             physical id: 0.0.0
             bus info: scsi@1:0.0.0
             logical name: /dev/sdb
             version: 0400
             serial: 201674803835
             size: 223GiB (240GB)
             capabilities: partitioned partitioned:dos
             configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=bd5fa220
           *-volume:0
                description: EXT4 volume
                vendor: Linux
                physical id: 1
                bus info: scsi@1:0.0.0,1
                logical name: /dev/sdb1
                logical name: /
                version: 1.0
                serial: eea663dc-aa20-4029-a86e-7f9f8ce67bbe
                size: 78GiB
                capacity: 78GiB
                capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
                configuration: created=2020-07-09 15:24:36 filesystem=ext4 label=Linux_SSD lastmountpoint=/ modified=2022-06-10 09:17:12 mount.fstype=ext4 mount.options=rw,relatime mounted=2022-06-10 09:17:13 state=mounted
           *-volume:1
                description: EXT4 volume
                vendor: Linux
                physical id: 2
                bus info: scsi@1:0.0.0,2
                logical name: /dev/sdb2
                logical name: /media/user00/r.all.SSD
                version: 1.0
                serial: 373e4ca3-d51e-4ffa-b546-4e8a815a5c17
                size: 145GiB
                capacity: 145GiB
                capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
                configuration: created=2020-07-09 15:51:18 filesystem=ext4 label=r.all.SSD lastmountpoint=/media/user00/r.all.SSD modified=2022-06-10 09:17:16 mount.fstype=ext4 mount.options=rw,noatime mounted=2022-06-10 09:17:16 state=mounted

Output of lscpu:

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   39 bits physical, 48 bits virtual
CPU(s):                          4
On-line CPU(s) list:             0-3
Thread(s) per core:              2
Core(s) per socket:              2
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           61
Model name:                      Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
Stepping:                        4
CPU MHz:                         1495.008
CPU max MHz:                     2700.0000
CPU min MHz:                     500.0000
BogoMIPS:                        4393.56
Virtualization:                  VT-x
L1d cache:                       64 KiB
L1i cache:                       64 KiB
L2 cache:                        512 KiB
L3 cache:                        3 MiB
NUMA node0 CPU(s):               0-3
Vulnerability Itlb multihit:     KVM: Mitigation: Split huge pages
Vulnerability L1tf:              Mitigation; PTE Inversion; VMX conditional cache flushes, SMT vulnerable
Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Meltdown:          Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:        Mitigation; Retpolines, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling
Vulnerability Srbds:             Mitigation; Microcode
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdp
                                 e1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds
                                 _cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lah
                                 f_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase t
                                 sc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap intel_pt xsaveopt dtherm ida arat pln pts md_clear flush_l1d

Output of lsusb:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 004: ID 04ca:2006 Lite-On Technology Corp. Broadcom BCM43142A0 Bluetooth Device
Bus 001 Device 003: ID 0bda:57b5 Realtek Semiconductor Corp. USB Camera
Bus 001 Device 002: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Output of lspci

00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Processor Thermal Subsystem (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.2 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 (rev e3)
00:1c.3 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 (rev e3)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
03:00.0 Network controller: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n (rev 01)

Edit: thanks guiverc for the nice edition

After reading a bit more in the xscreensaver website it seems that the first option to try would be (manually) updating it to a higher version than it is in my Lubuntu. (The version of xscreensaver in My Lubuntu is more than 3 years old, and the package manager does not offer to update it).

There seems to be a way to update it manually by downloading the latest version, but since I am going to upgrade Lubuntu soonish anyway, I will wait a bit.