Bug 217683 - Brightness can only be changed once on some HP laptops
Summary: Brightness can only be changed once on some HP laptops
Status: NEW
Alias: None
Product: ACPI
Classification: Unclassified
Component: Power-Video (show other bugs)
Hardware: All Linux
: P3 normal
Assignee: acpi_power-video
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-07-19 02:14 UTC by Kai-Heng Feng
Modified: 2023-07-19 02:15 UTC (History)
0 users

See Also:
Kernel Version:
Subsystem:
Regression: No
Bisected commit-id:

Attachments
dmesg (102.57 KB, text/plain)
2023-07-19 02:15 UTC, Kai-Heng Feng 		Details
acpidump (3.04 MB, text/plain)
2023-07-19 02:15 UTC, Kai-Heng Feng 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Kai-Heng Feng 2023-07-19 02:14:54 UTC 
Because ACPI video's child devices aren't put to D0 at boot, and the panel brightness on those devices requires _PS0 being evaluated to work properly.
Comment 1 Kai-Heng Feng 2023-07-19 02:15:19 UTC 
Created attachment 304659 [details]
dmesg
Comment 2 Kai-Heng Feng 2023-07-19 02:15:41 UTC 
Created attachment 304660 [details]
acpidump
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