On Tue, Jun 16, 2015 at 10:40:17AM -0500, Nathan Schulte wrote: > I am running Debian Sid on a laptop machine with an Intel Haswell > CPU with Intel HD 4600 graphics. > > >$ Xorg -version > > > >X.Org X Server 1.17.1 > >Release Date: 2015-02-10 > >X Protocol Version 11, Revision 0 > >Build Operating System: Linux 3.16.0-4-amd64 x86_64 Debian > >Current Operating System: Linux desmas-l 4.0.0-1-amd64 #1 SMP Debian 4.0.2-1 (2015-05-11) x86_64 > >Kernel command line: BOOT_IMAGE=/vmlinuz-4.0.0-1-amd64 root=UUID=f5ba8b5c-63aa-4a67-a07c-dd8d3297b2d3 ro quiet > >Build Date: 04 May 2015 11:22:06PM > >xorg-server 2:1.17.1-2 (http://www.debian.org/support) > >Current version of pixman: 0.32.6 > > Before reporting problems, check http://wiki.x.org > > to make sure that you have the latest version. > > When using RandR (xrandr, arandr), I am unable to re-configure my > displays from the one integrated in the machine (eDP1), to three > external displays (in this case, HDMI1 (DP -> DVI via DP++), HDMI2 > (HDMI -> DVI), HDMI3 (miniDP -> DVI); the machine has three external > connectors). I haven't played with DP and multi-stream transport, > but I expect it would behave similarly (that is, annoyingly). > > >xrandr: cannot find crtc for output HDMI > > My work-around is to issue two RandR requests, with the first one > enabling an external display, and the second one disabling the > internal display and enabling the rest. This is rather annoying and > conflicts with some of the scripts I use to automatically configure > my displays based upon context and hot-plug (autorandr). > > The internal display is 1920x1080, and the three external displays > are identical monitors with 1920x1200 resolution. I believe this is > key, and has to do with the number of available PLLs (2) and > encoders (3) in the Intel hardware. > > I've attached an strace (xrandr.log) of the xrandr command: > > >xrandr \ > > --output DP2 --off \ > > --output DP1 --off \ > > --output HDMI3 --mode 1920x1200 --pos 3120x0 --rotate left \ > > --output HDMI2 --mode 1920x1200 --pos 1920x0 --rotate left \ > > --output HDMI1 --primary --mode 1920x1200 --pos 0x410 --rotate normal \ > > --output eDP1 --off \ > > --output VGA1 --off > > Any help resolving this issue is greatly appreciated. I think this is the right fix: diff --git a/xrandr.c b/xrandr.c index fbfd93e..c0feac3 100644 --- a/xrandr.c +++ b/xrandr.c @@ -3029,7 +3029,7 @@ main (int argc, char **argv) if (!config_output) argerr ("%s must be used after --output\n", argv[i]); set_name_xid (&config_output->mode, None); set_name_xid (&config_output->crtc, None); - config_output->changes |= changes_mode; + config_output->changes |= changes_mode | changes_crtc; continue; } if (!strcmp ("--fb", argv[i])) { -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
