https://bugzilla.kernel.org/show_bug.cgi?id=204251
Scott Barr (scottjb...@gmail.com) changed:
What |Removed |Added
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CC| |scottjb...@gmail.com
--- Comment #9 from Scott Barr (scottjb...@gmail.com) ---
I see exactly the same issue with a Dell XPS 15 7590
- changing the values in /sys/class/backlight/intel_backlight/backlight doesn't
result in a change to screen brightness
- using the fn+f11 (reduce screen brightness) and fn+f12 (increase screen
brightness) results in ACPI errors in dmesg output (shown here for fn+f11)
[ 1067.475776] ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PCI0.PEG0.PEGP.BRT6.LCD], AE_NOT_FOUND (20190215/psargs-330)
[ 1067.475796] ACPI Error: Aborting method \_SB.PCI0.PEG0.PEGP.BRT6 due to
previous error (AE_NOT_FOUND) (20190215/psparse-529)
[ 1067.475940] ACPI Error: Aborting method \EV5 due to previous error
(AE_NOT_FOUND) (20190215/psparse-529)
[ 1067.476078] ACPI Error: Aborting method \SMEE due to previous error
(AE_NOT_FOUND) (20190215/psparse-529)
[ 1067.476213] ACPI Error: Aborting method \SMIE due to previous error
(AE_NOT_FOUND) (20190215/psparse-529)
[ 1067.476340] ACPI Error: Aborting method \NEVT due to previous error
(AE_NOT_FOUND) (20190215/psparse-529)
[ 1067.476691] ACPI Error: Aborting method \_SB.PCI0.LPCB.ECDV._Q66 due to
previous error (AE_NOT_FOUND) (20190215/psparse-529)
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