Radeon TV out stopped working after updating Kubuntu

Asked by Jukka


I have an old Dell Latitude D600 laptop with ATI Mobility Radeon 9000 display driver. I selected Kubuntu 10.10 as my distribution because it was one of the only ones that had TV out working by default (so that I can have a different image on the TV and the laptop screen).

I have noticed though that when I run all the updates on Kubuntu 10.10, the TV out stops working. I can still have the same image on both of the screens but when I select s-video as right of LVDS, both screens get mixed up. I've tried with xrandr and the GUI Display settings tool, the end result is the same.

I have reinstalled Kubuntu 10.10 and I have been looking at the packages that it could update. To my understanding the most probable causes for this could be:
- libdrm2 - 2.4.21-1ubuntu2 -> libdrm2 - and/or
- libdrm-radeon1 - 2.4.21-1ubuntu2 -> libdrm-radeon1 -

Is it possible that these packages might mix up the TV out on Radeon?

I haven't verified this yet and I don't want to install these bug fixes again, if the TV out is working without them. Also xserver-xorg-core and xserver-common have available updates, but to my understanding the above mentioned are more probable causes.

Best regards,


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Jukka (jukka-parviainen) said :

It seems that the Xorgs Radeon driver is still buggy (sometimes it works and sometimes it doesn't in every distro). The update to libdrm did not cause the problem.