Bug#587999: switches pixel columns

[Michel Dänzer]

tags 587999 upstream fixed-upstream
kthxbye

On Die, 2010-10-05 at 18:39 +0200, Ivan Vilata i Balaguer wrote: 
> 
> The problem with switched pixel columns only shows up in my computer when DRI
> acceleration isn't active.

BTW, this bug is fixed in the upstream release 6.13.2. Enabling the DRI
is still desirable for general performance though.


> To enable DRI I need to:
> 
> 1. Set ``options radeon modeset=0`` in /etc/modprobe.d/radeon-kms.conf so that
>    radeonfb doesn't use KMS and udev can create /dev/dri/card0.
> 
> 2. Install firmware-linux-nonfree which contains the Radeon firmware somehow
>    needed by the X server to enable DRI.
> 
> xserver-xorg-video-radeon already suggests firmware-linux (which depends on
> firmware-linux-nonfree), but the /etc/modprobe.d/radeon-kms.conf file it
> installs may need to set ``modeset=0`` instead of ``modeset=1``.

You should be able to get KMS working by disabling radeonfb, but
unfortunately it's not a full replacement yet at least on PPC laptops as
it doesn't support panel backlight control (hopefully fixed in the
mainline kernel soon) or suspend/resume (will probably take longer
still) yet.


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