11.04. No backlight at boot time (turns on on KDE startup)
Bug #775961 reported by
Alex Oleshkevich
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Medium
|
Unassigned |
Bug Description
Hello,
I have a laptop ASUS M51TR and after upgrading to kubuntu 11.04 there is no more screen backlight on boot.
I can see grub menu, then backlight turns off.
The backlight turns on only on KDE startup and works fine.
Firstly, the bug occured with 2.6.38 kernel upgrade on Kubuntu 10.10 and stays still in Kubuntu 11.04 (the same kernel).
Update to 2.6.39 does not fixes the problem.
tags: | added: backlight kernel |
description: | updated |
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This bug is unlike the others currently set as duplicates here:
The backlight does come back on by itself.
It is an Asus hardware while the others are Acers.
May also be the only KDE system.
Could you please check:
If you try on a terminal window:
sudo setpci -s 00:02.0 F4.B=10
does it affect the brightness? Is the backlight now rather dark or rather bright?
The same with
sudo setpci -s 00:02.0 F4.B=EE