Bug#697727: xserver-xorg-video-radeon: [radeon] Scrolling in xterm slow with KMS

Michel Dänzer daenzer at debian.org
Thu Jan 10 00:16:37 PST 2013

On Mit, 2013-01-09 at 20:01 +0100, Tilo Schwarz wrote: 
> Indeed, using
> % grep ColorTiling /etc/X11/xorg.conf
>          Option          "ColorTiling"   "off"
> the scrolling is twice as fast as without this option (from 12sec down to  
> 6sec). That is still almost three times slower than without KMS, but  
> already much more usable!

The better solution would be to configure your terminals to use
fontconfig/Xft for text rendering.

> What worries me is, that now I get the following error messages, whenever  
> I switch tags (using awesome WM, tags are like virtual desktops):
> r300: I got a pre-allocated buffer to use it as a texture storage, but the  
> buffer is too small. I'll use the buffer anyway, because I can't crash  
> here, but it's dangerous. This can be a DDX bug. Got: 7114752B, Need:  
> 7119360B, Info:
> r300: texture_desc_init: Macro:  NO, Micro: YES, Pitch: 1728, Dim:  
> 1678x1029x1, LastLevel: 0, Size: 7119360, Format: s8_uint_z24_unorm


> Maybe related to https://bugs.freedesktop.org/show_bug.cgi?id=42085

Looks like it. I attached a patch that might fix it.

Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer

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