[Bug 73705] New: External display not working - failed to enable link training, failed to start channel equalization
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu Jan 16 08:15:59 PST 2014
https://bugs.freedesktop.org/show_bug.cgi?id=73705
Priority: medium
Bug ID: 73705
CC: intel-gfx-bugs at lists.freedesktop.org
Assignee: intel-gfx-bugs at lists.freedesktop.org
Summary: External display not working - failed to enable link
training, failed to start channel equalization
QA Contact: intel-gfx-bugs at lists.freedesktop.org
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: krzysiek at skyman.pl
Hardware: x86-64 (AMD64)
Status: NEW
Version: XOrg CVS
Component: DRM/Intel
Product: DRI
On DELL LATTITUDE E5540,
kernel-3.13.0-rc8
xorg-server-1.15
xf86-video-intel-2.99.907-r1
Boot hangs when KMS with external display connected (DVI-D/VGA to docking
station or VGA with docking station disconnected).
It boots completely fine when display is disconnected.
If I connect display with X started (in vt7 console) desktop hangs, I cannot
switch to different console.
If I connect display after starting X and switching to text console it works
until I switch to X console (vt7).
Few seconds after disconnecting console everything starts working correctly.
In dmesg it prints only:
[ 158.165329] [drm:intel_dp_start_link_train] *ERROR* failed to enable link
training
[ 158.168028] [drm:intel_dp_complete_link_train] *ERROR* failed to start
channel equalization
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