On 29/04/17 04:15 AM, Alex Deucher wrote: > On Fri, Apr 28, 2017 at 5:46 AM, Felix Miata <[email protected]> wrote: >> Felix Miata composed on 2017-04-28 05:22 (UTC-0400): >> >>> Felix Miata composed on 2017-04-27 06:35 (UTC-0400): >> >>>> openSUSE Tumbleweed >>>> kernel 4.10.10 >>>> server 1.19.3 >>>> ATI HD5450 PCIe gfxcard (Cedar) >> ... >> When I use this startup script: >> xrandr --output DVI-0 --primary --mode 1920x1200 --left-of HDMI-0 >> xrandr --output HDMI-0 --mode 1920x1080 >> xrandr --output VGA-0 --mode 1680x1050 --above DVI-0 >> xrandr --dpi 108 >> >> things improve dramatically. 1920x1080 appears right of 1920x1200, and mouse >> can >> reach them both, but 1680x1050 remains asleep. >> Xrandr and Xorg.0.log combined: >> http://fm.no-ip.com/Tmp/Linux/Xorg/ATI3/xorg.0.log-tw-fi965-hd5450-atiDrv-viz-e >> >> Is this low-budget Sapphire ATI Cedar gfxcard not supposed to be able to >> produce >> on all three outputs at once? > > All evergreen cards only have 2 PLLs so that means they can only > support two independent clocks. If you want to use more than two > displays, you'll need to use displayport or for non-displayport, at > least two of the displays need to be using the exact same display > timing.
BTW, does only the pixel clock need to be identical, or do the vertical/horizontal blanking periods also need to happen at the same time? -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ xorg-driver-ati mailing list [email protected] https://lists.x.org/mailman/listinfo/xorg-driver-ati
