https://bugzilla.kernel.org/show_bug.cgi?id=100231
Bug ID: 100231
Summary: Brightness resets on un/plug
Product: ACPI
Version: 2.5
Kernel Version: 4.0.1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
Assignee: [email protected]
Reporter: [email protected]
Regression: No
It looks like the kernel/driver resets brightness on every plug/unplug.
/sys/class/backlight/ contains two directories:
acpi_video0/ & radeon_bl0/
Full brightness:
$ cat /sys/class/backlight/*/brightness
24
255
Zero brightness:
$ cat /sys/class/backlight/*/brightness
0
255
The reset doesn't actually change any value (or so it seems), even
/sys/devices/virtual/thermal/cooling_device1/, which contains the brightness,
doesn't change. But I tried changing the brightness manually and comparing and
it looks like it resets it to this position, even though it doesn't show it:
$ cat /sys/class/backlight/*/brightness
10
255
--
You are receiving this mail because:
You are watching the assignee of the bug.
------------------------------------------------------------------------------
_______________________________________________
acpi-bugzilla mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
