On Windows and Ubuntu, I can use Fn+F9 and Fn+F10 to lower or raise my screen brightness. This is a laptop-specific hotkey as far as I know.
openSUSE doesn’t respond to these hotkeys. Despite that, I am able to adjust the screen brightness in KDE’s power settings. Do I have to configure the hotkeys manually or something? Oddly enough, the laptop-specific volume hotkeys do work.
I wonder if the answer is in the question. KDE uses the brightness for its own purposes, eg. dimming windows that are not in focus - so you may have to rely on KDE. However, for most KDE functions, you can configure a hotkey.
I assume, as on my lenovo notebook, your HP came with Windows and everything pretty much worked OOTB. With openSUSE many features worked OOTB on mine, but not all. Very few of my Fn+F1-12 key functions work. However, brightness adjustment works correctly as labelled on Fn+Delete and Fn+Home. This is using 11.3 with distributed desktop kernel (+updates), and now the built-in speaker mute button works correctly with its backlight on when mute. However, I read an open Ubuntu bug report against my lenovo model with various users claiming a regression from Lucid to Maverick for a few function keys/buttons that now don’t work. Of course, that involves a newer kernel. For mine (now a year old), its further complicated because it has a different firmware/bios to other ThinkPad models that can use the special thinkpad_acpi kernel module. That module will not load, so there is no workaround for the Ubuntu problem, nor a solution for openSUSE in the very near future.
In the absence of a h/w specific ACPI kernel module, the special laptop functions, keys, and buttons rely on generic ACPI modules and the kernel, that also needs to interface with the laptops firmware/BIOS data. Brightness control is a known issue for ACPI support of various laptop models, and a complete rewrite is likely.
If that ACPI support fails your laptop, I assume KDE (or Gnome) settings will also fail.
Sadly, after rebooting the X server seems to have trouble starting. I tried switching to tty1-tty7 using Ctrl+Alt+F1, …, Ctrl+Alt+F7 but the screen remained black. So then I tried uninstalling the driver, but that didn’t help. How do I revert to my last working X configuration? I can still boot into failsafe and log in to KDE.
My video card has been identified by Smolt as “M93 [Mobility Radeon HD 4500 Series]”.
Merely removing /etc/X11/xorg.conf didn’t work. (It would have been cool if you could just delete the configuration and have X magically fix itself by reverting to default settings though.)
I did find a file called xorg.conf.install which, I assume, is a copy of the version of xorg.conf that was created during install. I cp’ed that to xorg.conf and now the graphical interface will boot again. What should I do with the driver? My system apparently works better without the proprietary(?) ATI driver or I picked the wrong one. Should I stick with the generic driver?
I’m getting word in the KDE forums that brightness adjustment hotkeys have been added in KDE 4.5. Zypper reports that I’m running version 4.4.4-1.5 if I’m not mistaken.
pdedecker@linux-s6cn:~> zypper info kdebase4
Loading repository data…
Reading installed packages…
Information for package kdebase4:
Installed Size: 508.0 KiB
Summary: The Base KDE Apps
This package contains the basic applications for a K Desktop
As far as I know, I have two options at this point. I can wait for the openSUSE guys to roll out KDE 4.5 through the updater or I can risk bricking my KDE install by looking for a homebrew repository that offers KDE 4.5. Is there an expected rollout date for the 4.5 update?
That’s interesting, since I have brightness adjustment keys working on both KDE 4.4.4 and KDE 4.5.4 on my notebook. I noticed one difference, on 4.5.4 I also get a scale indicator of the brightness level displayed on the desktop, on 4.4.4 that doesn’t appear.