Public bug reported:
Brightness control sometimes doesn't work after boot. Doing `sudo apt
install --reinstall kscreen`, logging out, and logging back in usually
resolves the problem. Booting into Windows, adjusting the brightness,
then rebooting back into Kubuntu sometimes resolves the problem.
Switching the ports so that the WD15 dock is connected to the USB-C port
closer to the power socket and the display is connected to the other
USB-C port fixed the issue. Apple USB-C to HDMI dongle exhibited the
same issue when plugged into the same port. When the WD15 was connected
to the port
I still find it weird that no issues occur in Windows. Will try to
reproduce with kernel 5.7 and attach dmesg.
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https://bugs.launchpad.net/bugs/1881213
Title:
System hangs at reboot or
@kaihengfeng
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https://bugs.launchpad.net/bugs/1881213
Title:
System hangs at reboot or poweroff. kworker blocked at dp_altmode_work
To manage notifications about this bug go to:
@kaifengheng
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https://bugs.launchpad.net/bugs/1881213
Title:
System hangs at reboot or poweroff. kworker blocked at dp_altmode_work
To manage notifications about this bug go to:
Issue still occurs on latest mainline kernel without nvidia proprietary
drivers. Attached another picture as logging is shutdown when issue
occurs. The attached display is only connected to the dedicated GPU and
is not outputted to at all in this configuration.
** Attachment added: "Picture of
Additional information:
Philips PHL276E8V attached via USB-C to DP1.2 cable
Dell WD15 Dock attached via USB-C cable
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https://bugs.launchpad.net/bugs/1881213
Title:
System hangs at
** Package changed: xorg (Ubuntu) => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1881213
Title:
System hangs at reboot or poweroff. kworker blocked at dp_altmode_work
To manage
Public bug reported:
Expected:
System reboots/powers off.
Actual:
System hangs with the plymouth bootsplash with the Kubuntu logo. Pressing
escape shows `[OK] Reached target Reboot`. `journalctl -b -1` shows at the end.
```
May 28 16:33:21 jordan-ThinkPad systemd[1]: Shutting down.
May 28
