[Bug 63392] New: xrandr --output DP1 --mode 2560x1440 lokup ironlake_crtc_mode_set+0x877/0x8a0 - Thunderbolt display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63392

          Priority: medium
            Bug ID: 63392
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: xrandr --output DP1 --mode 2560x1440 lokup
                    ironlake_crtc_mode_set+0x877/0x8a0 - Thunderbolt
                    display
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: freedesktop at zignar.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 77760
  --> https://bugs.freedesktop.org/attachment.cgi?id=77760&action=edit
log output

Since Kernel 3.8.3 up to including 3.8.6 the system locks up whenever I try to
use xrandr --output DP1 --mode 2560x1440 with a monitor connected over
thunderbolt.

Last Kernel Version that worked was 3.7.9 although I didn't try anything
between 3.7.9 and 3.8.3

Same operation works fine if I'am connected to a older Cinema Display over the
mini Display Port.

If the mode is omitted the display works in a low resolution (e.g. xrandr
--output DP1 --left-of eDP1 works).

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