** Changed in: linux (Ubuntu Jammy)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Mantic)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/2060422
Title:
Avoid creating non-working backlight sysfs knob from ASUS board
Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Jammy:
Fix Committed
Status in linux source package in Mantic:
Fix Committed
Status in linux source package in Noble:
Confirmed
Bug description:
[Impact]
Backlight sysfs knobs created by asus-wmi don't really work, hence
systemd-backlight services are in failed state.
[Fix]
Ensure the backlight device are really present
[Test]
With the fix applied, the backlight sysfs knobs are not longer present
under /sys/class/backlight, so there's no more failed systemd-backlight
service.
[Where problems could occur]
Though highly unlikely, but if there's working device that is created
even when the WMI read is 0xffffffff, the device will be missing.
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