<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - sna: (Haswell) X-server freezes when enabling DP at docking station" href="https://bugs.freedesktop.org/show_bug.cgi?id=71267#c115">Comment # 115</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - sna: (Haswell) X-server freezes when enabling DP at docking station" href="https://bugs.freedesktop.org/show_bug.cgi?id=71267">bug 71267</a> from <a class="email" href="mailto:tytso@mit.edu" title="Theodore Ts'o <tytso@mit.edu>"> Theodore Ts'o</a> <pre>I tried applying the two patches which you posted on intel-gfx[1], ported to 3.13. [1] <a href="http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/33737">http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/33737</a> Using a T540p and an Ultradock, connected to a Dell U2410 via a DisplayPort cable --- and it worked! Not only were there no hangs, but in fact I could enable and disable the external display. The "too many retries" did indeed trigger: [ 4.152360] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 ... [ 4.245174] fbcon: inteldrmfb (fb0) is primary device ... [ 5.952436] [drm:intel_dp_aux_native_write] *ERROR* too many retries, giving up [ 6.004766] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off [ 6.129836] Console: switching to colour frame buffer device 240x75 [ 6.134854] i915 0000:00:02.0: fb0: inteldrmfb frame buffer [ 6.134856] i915 0000:00:02.0: registered panic notifier [ 6.275753] ACPI: Video Device [VID] (multi-head: yes rom: no post: no) [ 6.276089] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input11 [ 6.276620] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 6.277149] snd_hda_intel 0000:00:03.0: irq 46 for MSI/MSI-Xdevice When I tried disabling the external monitor, undocking, and redocking, and then tried enabled the external monitor again, the too many retries did trigger again: [ 1066.879571] drm: not enough stolen space for compressed buffer (need 33554432 more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this. [ 1070.884851] [drm:intel_dp_aux_native_write] *ERROR* too many retries, giving up</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>