[Bug 61461] New: *ERROR* failed to set mode on [CRTC:7] when changing xrandr settings

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=61461

            Bug ID: 61461
           Summary: *ERROR* failed to set mode on [CRTC:7] when changing
                    xrandr settings
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.10.10-1-ARCH
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: oliver at flowriver.net
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 108491
  --> https://bugzilla.kernel.org/attachment.cgi?id=108491&action=edit
journalctl output including call traces

Hi,

if I want to attach two external monitors to my Lenovo T431s and deactivate the
internal monitor I have this behaviour

When I run:

xrandr --output DP3 --primary --mode 2560x1440 --output DP2 --mode 2560x1440
--left-of DP3 --output eDP1 --off

  to deactivate the internal monitor and make one big extended monitor it does
not work: i.e. I get black screens on all three monitors, sometimes the
internal keeps working but the externals not.

The strange thing is that it works automatically with Gnome 3.8: The monitors
are autodetected, the internal monitor is disabled and the two external
monitors are activated. Without a Desktop Environment and with just a simple
window manager (awesome in my case) the error described above occurs.

I would be glad to help in solving this issue.

Regards,
Oliver

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