On Wed, Oct 13, 2010 at 3:27 PM, Daniel Hill <[email protected]> wrote: > I found the fglrx drivers quite good you just have to configure the > xorg file your self
I think we may be going around in circles. Regardless of driver, Ximerama still seems to be the only way to get 4 monitors working under one desktop. With fglrx drivers and no xinerama, I can get two screens working; glxgears reports ~1000FPS. xrandr can see four outputs, DPF1, DPF2, CRT1, CRT2 -- but the CRT ones are listed as disconnected and I can't bring them into play. I can configure crossfirex, this doesn't give me any extra screens but boosts glxgears to ~6000FPS (!!). I guess that's not the best performance metric, but it indicates that something changed :-) So, using my original xorg.conf, substituting fglrx for radeon, I can get 4 monitors up with Xinerama (admittedly in a completely different left-right order). With some occasional screen drawing corruption. And starting one of the problem applications crashes X hard again ... so hard that GDM doesn't restart (I haven't looked into the logs for this) and sometimes the whole machine locks up. The only improvement is that glxgears works again, at ~180FPS. Go figure :-) So I think I'll stick with radeon drivers, open source for the win, and assume that Xinerama is the responsible party to the crashes, and hope that https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/657966 or something similar gets picked up and resolved. Or perhaps I'll have to go back to 10.04 and backport the Ubuntu font, which as far as I can see is the 'best' bit of 10.10 for me ... Actually, given that VirtualBox doesn't work any more, I will have to go back to 10.04. Meh. -jim _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
