I just want to report that the patch attached by Josselin is working
great here [1]. I hope it will be possible to sort out the license issues
and integrate the patch in future releases.
Till.
[1] ATI Radeon Mobility M6 LY in a Compaq EVO N410c notebook
Debian testing, custom 2.6.19.1 kernel, radeon_drv 6.6.3