Bug 475238 - can't boot with kernel 6.5, black screen (boot with 6.4 / 6.1LTS are ok)
Summary: can't boot with kernel 6.5, black screen (boot with 6.4 / 6.1LTS are ok)
Status: RESOLVED UPSTREAM
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 5.27.8
Platform: Manjaro Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-10-05 10:15 UTC by fluffy bunny
Modified: 2024-08-20 16:36 UTC (History)
2 users (show)

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Description fluffy bunny 2023-10-05 10:15:21 UTC
hello
i have problem after updaed to kernel 6.5, the screen goes black (doesn't display anything), after entering password in login screen
but after i revert back to kernel 6.4 or 6.1LTS, booting is OK, no problem

here is my hardware specs : (output from inxi -Fazy)
https://0x0.st/HWrO.txt

here is output of journalctl at booting with 6.5
https://0x0.st/HOnf.txt

and here is output of journalctl at booting with 6.4 (for comparison)
https://0x0.st/HOnm.txt

i have reported this at manjaro forum :
https://forum.manjaro.org/t/kernel-6-5-doesnt-work-with-amd-a9-apu/148383/13

laptop works fine with kernel 6.4 / 6.1LTS, just i am curious why 6.5 doesn't work (& based on my personal interpretation from journalctl output, it may related with KDE...)

any help is deeply appreciated
Comment 1 fluffy bunny 2023-10-22 05:53:03 UTC
the pattern of this case had been found : case occurs only when scale at display setting < 100% in kernel 6.5
scale < 100% & kernel 6.5 >> problem occurrs
scale < 100% & kernel 6.4 >> no problem
scale = 100% & kernel 6.5 >> no problem

i hace created separated bug : 475904
Comment 2 Nate Graham 2024-08-20 16:36:34 UTC
If a kernel upgrade reproducibly breaks something, then it's a kernel regression. Per Bug 475904#c8, it looks like that's exactly what happened.