cela fait plusieurs jours que j'ai trés blocage complet du PC avec obligation de hard reset à chaque coup. Cela rrive régulièrement lorsque que ma femme (qui est prof) fait des classe virtuelle (visio conférence). Voila ce que donne le journal :
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[sebastien@Aquilam ~]$ journalctl -p err..alert --since="2020-04-14 10:00:00"
-- Logs begin at Sat 2018-08-18 19:13:12 CEST, end at Tue 2020-04-14 11:57:24 CEST. --
avril 14 10:21:23 Aquilam kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.VGA.LCD._BCM.AFN7], AE_NOT_FOUND (20191018/psargs-330)
avril 14 10:21:23 Aquilam kernel: ACPI Error: Aborting method \_SB.PCI0.VGA.LCD._BCM due to previous error (AE_NOT_FOUND) (20191018/psparse-529)
avril 14 10:21:23 Aquilam kernel: ACPI Error: Evaluating _BCM failed (20191018/video-357)
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc0183, and key code 226: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1001, and key code 216: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1002, and key code 212: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1003, and key code 392: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1004, and key code 393: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1005, and key code 442: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc100a, and key code 235: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc100b, and key code 168: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc100c, and key code 208: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc100f, and key code 184: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1010, and key code 185: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1011, and key code 403: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1012, and key code 402: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1013, and key code 212: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1014, and key code 152: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1015, and key code 167: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1016, and key code 213: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1017, and key code 161: Invalid argument
avril 14 10:21:25 Aquilam systemd-udevd[322]: event7: Failed to call EVIOCSKEYCODE with scan code 0xc1018, and key code 171: Invalid argument
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usb 5-2: 3:1 cannot set frq 16000 to ep 0x86
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dmesg
...
[ 1570.149370] usb 5-2: USB disconnect, device number 3
[ 1577.895436] usb 5-4: new high-speed USB device number 5 using ehci-pci
[ 1578.039941] usb 5-4: New USB device found, idVendor=046d, idProduct=09a2, bcdDevice= 0.08
[ 1578.039947] usb 5-4: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ 1578.039950] usb 5-4: SerialNumber: 8B526920
[ 1578.041453] uvcvideo: Found UVC 1.00 device <unnamed> (046d:09a2)
[ 1578.105866] uvcvideo 5-4:1.0: Entity type for entity Extension 4 was not initialized!
[ 1578.105871] uvcvideo 5-4:1.0: Entity type for entity Extension 10 was not initialized!
[ 1578.105875] uvcvideo 5-4:1.0: Entity type for entity Extension 12 was not initialized!
[ 1578.105878] uvcvideo 5-4:1.0: Entity type for entity Extension 8 was not initialized!
[ 1578.105881] uvcvideo 5-4:1.0: Entity type for entity Extension 11 was not initialized!
[ 1578.105884] uvcvideo 5-4:1.0: Entity type for entity Processing 2 was not initialized!
[ 1578.105887] uvcvideo 5-4:1.0: Entity type for entity Extension 13 was not initialized!
[ 1578.105890] uvcvideo 5-4:1.0: Entity type for entity Camera 1 was not initialized!
[ 1578.106069] input: UVC Camera (046d:09a2) as /devices/pci0000:00/0000:00:12.2/usb5/5-4/5-4:1.0/input/input40
[ 1578.134814] usb 5-4: set resolution quirk: cval->res = 384
...