I mean that i disabled output to my benq monitor with the display tool that comes with ubuntu (in the preferences menu). Eg. the Benq screen went into stand-by and the TV was the only one displaying content.What do you mean by "disabled" ? Were the monitors cloned, or displaying different content?
Regarding 3D and dynamic power management, I meant that running the card at half speed is fine for 2D, but not so fine when running heavy 3D applications Your answer regarding KMS and power-management was enlightening none the less.
Thanks for all the help and info bridgman, it's really appreciated.
Last edited by zhark; 08-28-2009 at 06:22 AM.
It does seem to depend on xserver, eg. recent git is working (but only by luck), but there was a time when it didn't work for me.
I have mentioned it on IRC, but haven't filed a bug as they still seem to be assigned to Luc.
The easiest solution would be to use radeon, now that you know how to set up power saving (you should actually save more as I don't think hd halves the clock again when in dpms).
If it is the same issue that I see and you really need to use hd eg, for HDMI audio then you could make a one line change to the code to hardcode the TVs vert res, not very good for when you are using the other screen, though.
Thanks for helping! I use DVI and a DVI->HDMI adapter and SPDIF for audio since my card doesn't have HDMI out, so radeon with power saving turned on is perfectly fine for me. Problem solved.
Last edited by zhark; 08-29-2009 at 07:04 AM.