Backlight brightness problem on HP Compaq 8710p
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Gentoo Linux |
New
|
Undecided
|
Unassigned | ||
acpi-support (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
I've got HP 8710p laptop with Ubuntu 8.10 intrepid, Kernel 2.6.27-9-generic and GNOME 2.24.1
My video card is NVIDIA Quadro NVS 320M using 173.14.12 driver version
Everything still works fine except backlight brightness adjustment, and my problem is interesting and differs from previous bug reports posted by others.
I can adjust brightness before Ubuntu is loaded (e.g. in grub loader or bios settings) by pressing Fn+F9/F10, that means these are hardware keys, right?
When I go to Power Management, i see "Set display brightness to:" slider, but moving it does no changes to backlight brightness.
When I press Fn+F9/F10 keys to adjust brightness, I see the adjustment bar at the bottom of my screen, showing more or less brightness when I press keys, but actually no changes is being made to it. Doing this, I watch the output of "cat /proc/acpi/
When I exit to console (by pressing Ctrl+Alt+F1), I'm able to change brightness fine with my keys, and when I go back to GNOME (pressing Alt+F7) the brightness remains as I've set it in console, and "cat /proc/acpi/
I've searched all over the Internet for my issue, but could not find anything, the most of other issues are about unability to change that "current" value with the keys, but as you see I have some other problem.
I'm a little newbie in Linux, so if you need any logs or some extra information, I'll be glad to add it to my post.
Any help and replies would be appreciated.
i don't exactly know whom i should assign this report to