Kubuntu screen lock after host OS sleep (screen locking disabled)

J

JaniP

Junior Member
I have strange problem: after host OS sleep my Kubuntu guest OS is showing screen unlock prompt though I have disabled screen locking from Kubuntu system settings.
Also the unlock screen proportions are not matching the screen: windows on the desktop are visible on the background and partly possible to interact with.. Interacting with the unlock prompt, however, is difficult:
  • the effective location of UI elements are where they should be according to screen not where they are shown
  • the password does not unlock desktop, but leaves the system in a state where very few interactions are possible (I guess the same as with the unlock prompt shown), for example terminal does not take input.. shutting down gracefully is impossible.
  • the only safe way out from unlock prompt is to shutdown/restart
some kernel logs included, in case it helps..

Any idea how to get rid of this?
BR,
Jani
 

Attachments

  • guest-unlock.png
    guest-unlock.png
    141 KB · Views: 5
  • kern.log.txt
    kern.log.txt
    19.3 KB · Views: 1
from kernel log:

Code: 
Sep 16 09:08:45 kettu kernel: [  122.453367] WARNING: CPU: 0 PID: 1205 at drivers/gpu/drm/drm_gem.c:1035 drm_gem_object_put+0x42/0x50 [drm]
Sep 16 09:08:45 kettu kernel: [  122.453368] Modules linked in: hid_generic usbhid hid prl_vid(POE) drm_kms_helper syscopyarea crct10dif_pclmul gpio_ich sysfillrect crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd sysimgblt fb_sys_fops cryptd glue_helper drm psmouse ahci lpc_ich virtio_net libahci i2c_i801 pata_acpi net_failover failover prl_tg(POE)
Sep 16 09:08:45 kettu kernel: [  122.453375] CPU: 0 PID: 1205 Comm: plymouthd Tainted: P           OE     5.4.0-84-generic #94-Ubuntu
Sep 16 09:08:45 kettu kernel: [  122.453376] Hardware name: Parallels Software International Inc. Parallels Virtual Platform/Parallels Virtual Platform, BIOS 17.0.1 (51482) 09/01/2021
Sep 16 09:08:45 kettu kernel: [  122.453381] RIP: 0010:drm_gem_object_put+0x42/0x50 [drm]
Sep 16 09:08:45 kettu kernel: [  122.453382] Code: 8d 78 68 e8 50 65 0f f6 84 c0 74 1e f0 41 ff 0c 24 0f 88 a5 c2 02 00 74 05 41 5c 5d c3 c3 4c 89 e7 e8 d2 f5 ff ff 41 5c 5d c3 <0f> 0b eb de 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 85 ff
Sep 16 09:08:45 kettu kernel: [  122.453383] RSP: 0018:ffff9d50434ffc68 EFLAGS: 00010246
Sep 16 09:08:45 kettu kernel: [  122.453384] RAX: 0000000000000000 RBX: ffff9d50434ffd50 RCX: ffff91f19b0a50c0
Sep 16 09:08:45 kettu kernel: [  122.453384] RDX: 0000000000000000 RSI: ffff91f19b0a50c0 RDI: ffff91f19a179868
Sep 16 09:08:45 kettu kernel: [  122.453385] RBP: ffff9d50434ffc70 R08: ffff91f19b0a50c0 R09: ffff91f1ac007640
Sep 16 09:08:45 kettu kernel: [  122.453385] R10: ffff91f19a478c40 R11: 00000000000004b5 R12: ffff91f19b0a5000
Sep 16 09:08:45 kettu kernel: [  122.453386] R13: 0000000000000000 R14: ffff91f19a179800 R15: ffff91f19b0a4a00
Sep 16 09:08:45 kettu kernel: [  122.453386] FS:  00007ff0008d9740(0000) GS:ffff91f1af400000(0000) knlGS:0000000000000000
Sep 16 09:08:45 kettu kernel: [  122.453387] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 16 09:08:45 kettu kernel: [  122.453387] CR2: 00007ff0008b3000 CR3: 0000000829f5e004 CR4: 00000000003606f0
Sep 16 09:08:45 kettu kernel: [  122.453388] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 16 09:08:45 kettu kernel: [  122.453388] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 
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