Hello,

I am currently upgrading from the elderly KDE 4.0.5 running on xorg-server 1.5.3 and fglrx (I have a RadeonHD 2400 Pro) to KDE 4.3.4/xorg-server 1.7.3/radeon (xf86-video-ati 6.12.x).

On my old system, I used to switch between many resolutions using Ctrl+Alt+Plus, but on my new system I have fewer resolutions and Ctrl+Alt+Plus doesn't work.

So, that's a two-part problem. I couldn't find any info about Ctrl+Alt+Plus not working, so for the time being I'm switching via the Display settings. Which brings me to the second issue: some resolutions are missing. I have looked into Xorg.0.conf and found that not all of my old resolutions were detected by the new driver. "Not a problem" I thought, "I'll just add new resolutions to xorg.conf." Now I have added the resolution I wanted to use to xorg.conf, but it doesn't appear in the Display settings. The only way for me to use this resolution is to manually add it using xrandr:

Code: Select all

xrandr --newmode "1280x800_60.00" 83.50  1280 1352 1480 1680  800 803 809 831 -hsync +vsync
xrandr --addmode DVI-0 "1280x800_60.00"

So, here are my questions:

1. is there a way to get Ctrl+Alt+Plus to work?
2. how can I make KDE recognize the added resolutions automatically?

Some files:

• xorg.conf
• Xorg.0.log

Thanks for any info!

KDE "auto detects" the resolutions, through the RAndR extension provided by X. Thus, you will need to either convince the driver that the resolutions are supported, or run on login, a script which uses "xrandr" to add the needed modes.

It is likely that Ctrl + Alt + (+) is a driver specific shortcut, or is provided by running "krandrtray", which provides convenience access to the display module settings through the system tray.

In the end, I've created a script in /etc/X11/xinit/xinitrc.d that adds the resolution via xrandr.

I couldn't find how to re-enable Ctrl+Alt+Plus but I guess I should be able to create a shortcut in KDE that would execute a script that rotates the available resolution.