Using eDP leaves kernel log with "Timed out waiting for DP idle patterns" messages
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
Linux |
Fix Released
|
High
|
|||
linux (Ubuntu) |
Fix Released
|
Low
|
Timo Aaltonen | ||
Quantal |
Fix Released
|
Low
|
Timo Aaltonen | ||
Raring |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
[Impact]
* This confuses end users. They think that this is a relevant message instead of an
unimportant accident to the eDP
[Test Case]
* Use an eDP haswell system
* See this message in dmesg
[Regression Potential]
* Low. This patch just skips a port check on eDP machines
* It has already been tested on eDP machines
[Other Info]
* private bug 1097143
[Original message]
eDP on haswell graphics puts some stuff in dmsg that is scary to users. Worse, these messages are displayed on suspend/resume, and because we don't have vt-switchless resume support in ubuntu yet, when the graphics don't work it seems like these messages are the culprit.
Dmesg:
[11577.928164] [drm:intel_
[11577.928167] [drm:i915_write32] *ERROR* Unknown unclaimed register before writing to 64040
description: | updated |
description: | updated |
Changed in linux: | |
importance: | Unknown → High |
status: | Unknown → Confirmed |
Changed in linux: | |
status: | Confirmed → Incomplete |
tags: | added: blocks-hwcert-enablement |
Changed in linux: | |
status: | Incomplete → Fix Released |
Changed in hwe-next: | |
status: | New → Fix Released |
no longer affects: | linux (Ubuntu Precise) |
Changed in linux (Ubuntu Quantal): | |
status: | New → In Progress |
Changed in linux (Ubuntu Quantal): | |
status: | In Progress → Fix Committed |
importance: | Undecided → Low |
assignee: | nobody → Timo Aaltonen (tjaalton) |
Changed in linux (Ubuntu): | |
importance: | Undecided → Low |
Changed in linux (Ubuntu Quantal): | |
status: | Fix Committed → In Progress |
Created attachment 72120
dmesg.log
GDM can't show and screen freeze after screen saver and turn off backlight command( "gnome- screensaver- command -l;sleep 3;xset dpms force off")
But, if you press Ctrl+Alt+F3(tty3) then press Ctrl+Alt+F2(tty0), GDM will show.
Dmesg: dp_set_ link_train] *ERROR* Timed out waiting for DP idle patterns
[11577.928164] [drm:intel_
[11577.928167] [drm:i915_write32] *ERROR* Unknown unclaimed register before writing to 64040
Expected output: it enter to screensaver and turn off backlight, then press any key to resume system, it should shows GDM.
This only happens on Haswell chipset, but it is OK on Ivybridge.
Kernel 3.7.0 added intel 3.7.0 branch kernel patch
Xorg1.12.0
Model: Lenovo Y410 Y510