https://bugzilla.kernel.org/show_bug.cgi?id=204251
TechGliTcH (d...@9w7.net) changed:
What |Removed |Added
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CC| |d...@9w7.net
--- Comment #37 from TechGliTcH (d...@9w7.net) ---
September of 2022, I'm on Ubuntu 22.04 using 5.19.0-12.1-liquorix-amd64 kernel
and I can confirm I see the same problem still when adjusting the brightness on
a Dell Precision 5540 with OLED panel and Nvidia+Intel graphics card, profile
is set to "NVIDIA On-Demand" so Intel CoffeeLake-H GT2 (UHD Graphics 630) is
the main driver and nvidia quadro t2000 just boosts when needed, which isn't
often.
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[163874.296179] ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PCI0.PEG0.PEGP.BRT6.LCD], AE_NOT_FOUND (20220331/psargs-330)
[163874.296190] ACPI Error: Aborting method \_SB.PCI0.PEG0.PEGP.BRT6 due to
previous error (AE_NOT_FOUND) (20220331/psparse-529)
[163874.296240] ACPI Error: Aborting method \EV5 due to previous error
(AE_NOT_FOUND) (20220331/psparse-529)
[163874.296288] ACPI Error: Aborting method \SMEE due to previous error
(AE_NOT_FOUND) (20220331/psparse-529)
[163874.296337] ACPI Error: Aborting method \SMIE due to previous error
(AE_NOT_FOUND) (20220331/psparse-529)
[163874.296386] ACPI Error: Aborting method \NEVT due to previous error
(AE_NOT_FOUND) (20220331/psparse-529)
[163874.296434] ACPI Error: Aborting method \_SB.PCI0.LPCB.ECDV._Q66 due to
previous error (AE_NOT_FOUND) (20220331/psparse-529)
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I have not yet tried i915.enable_dpcd_backlight=1 ; but the brightness control
does seem to work, but it gets a little funny around 85%, like up to 85% it's
adjusting the brighness but 90/95/100 it's instead playing with the contrast.
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