On Mon, Jun 29, 2009 at 3:01 PM, Gilad Arnold<[email protected]> wrote: > On Thu, Jun 18, 2009 at 10:08:18AM +1000, Alex Deucher wrote: >> > Looks like at least the mode I tested with explicitly, 1680x1050, >> > has the same timing rates (60.0). I believe (not tested right now, >> > not in front of the external monitor) that I can actually activate >> > both VGA-0 and DVI-0 at any mode (on the same rate) if I turn one >> > off, set the other to the desired mode, then set the first one to >> > the same mode. I can test if you like. >> >> You'll have to look at the actual mode lines (xrandr --verbose) to see >> is they are really indentical. If the modes are indentical you should >> be able to drive both heads using the same crtc. > > See below, first is VGA-0 and second is DVI-0. > > $ xrandr --verbose | grep -A 2 1680x1050 > 1680x1050 (0x57) 147.1MHz -HSync +VSync > h: width 1680 start 1784 end 1968 total 2256 skew 0 clock 65.2KHz > v: height 1050 start 1051 end 1054 total 1087 clock 60.0Hz > -- > 1680x1050 (0x57) 147.1MHz -HSync +VSync > h: width 1680 start 1784 end 1968 total 2256 skew 0 clock 65.2KHz > v: height 1050 start 1051 end 1054 total 1087 clock 60.0Hz > >> You can use the --crtc option with xrandr to force which crtc you want to >> drive a particular output. > > $ xrandr --output DVI-0 --crtc 1 --mode 1680x1050 --rate 60.0 > xrandr: cannot find crtc for output DVI-0 > > Exact same error. I have to switch off one of the two in order to change mode > on the other. > >> >> Alternatively, xrandr isn't being smart about how it sets the mode which >> >> results in the error. >> > >> > If this is the case, where should I report this? >> >> https://bugs.freedesktop.org > > In the case that you are certain that this isn't a driver issue, let me know > and I'll file a bug.
Seems like an xrandr bug to me. Alex _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
