[i945] spontaneous black screen (major pipe-A underrun)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xf86-video-intel |
Fix Released
|
High
|
|||
linux (Ubuntu) |
Fix Released
|
High
|
Unassigned |
Bug Description
Binary package hint: xserver-
I am using a Dell Latitude D430 with an Intel GM945.
When I use my external 19" TFT (through DVI, 1280x1024), I occasionally get a black screen. This is not triggered by anything obvious, it just happens spontaneously. It is impossible to recover from this with restarting X, only a reboot cures it.
Further investigation shows that this is caused by a long series of
(EE) intel(0): underrun on pipe A!
errors (some 10.000 lines in the log). I get short underruns pretty often, which results in the screen flickering for a split second, but when the long series happens, the screen stays black forever.
A comparison of the intel_reg_dump output (-: works, +: black screen) confirms this as well:
-(II): PIPEASTAT: 0x00000203 (status: VSYNC_INT_STATUS VBLANK_INT_STATUS OREG_UPDATE_STATUS)
+(II): PIPEASTAT: 0x80000000 (status: FIFO_UNDERRUN)
I have not observed this behaviour when I use the laptop undocked, with the internal screen (1280x800).
This is current Jaunty with -intel 2:2.5.1-1ubuntu7. It also happened in Intrepid, but back then I didn't know about intel_reg_dumper.
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: xserver-
ProcEnviron:
PATH: custom, user
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcVersion: Linux version 2.6.28-4-generic (buildd@palmer) (gcc version 4.3.3 20081217 (prerelease) (Ubuntu 4.3.2-2ubuntu9) ) #5-Ubuntu SMP Fri Dec 26 22:48:51 UTC 2008
SourcePackage: xserver-
Uname: Linux 2.6.28-4-generic i686
xkbcomp:
[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
Subsystem: Dell Device [1028:0201]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
Subsystem: Dell Device [1028:0201]
Related branches
Changed in xserver-xorg-video-intel: | |
status: | Unknown → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | New → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → Invalid |
description: | updated |
Changed in xserver-xorg-video-intel: | |
status: | Invalid → Unknown |
importance: | Undecided → High |
status: | Confirmed → Triaged |
Changed in xserver-xorg-video-intel: | |
status: | Unknown → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → Unknown |
Changed in xserver-xorg-video-intel: | |
status: | Unknown → Confirmed |
Changed in xserver-xorg-video-intel: | |
assignee: | nobody → pitti |
Changed in xserver-xorg-video-intel: | |
status: | Triaged → Fix Committed |
Changed in xserver-xorg-video-intel: | |
status: | Fix Committed → Fix Released |
Changed in xserver-xorg-video-intel: | |
status: | Fix Released → Confirmed |
assignee: | pitti → nobody |
Changed in xserver-xorg-video-intel (Ubuntu): | |
assignee: | nobody → pitti |
status: | Confirmed → In Progress |
Changed in xserver-xorg-video-intel (Ubuntu): | |
assignee: | pitti → nobody |
status: | In Progress → Triaged |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → In Progress |
tags: | added: black-screen |
Changed in xserver-xorg-video-intel: | |
status: | In Progress → Fix Released |
Changed in xserver-xorg-video-intel: | |
status: | Fix Released → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → Fix Released |
Changed in xserver-xorg-video-intel: | |
status: | Fix Released → Confirmed |
Changed in xserver-xorg-video-intel: | |
status: | Confirmed → Fix Released |
Changed in xserver-xorg-video-intel: | |
importance: | Unknown → High |
Changed in xserver-xorg-video-intel: | |
importance: | High → Unknown |
Changed in xserver-xorg-video-intel: | |
importance: | Unknown → High |
Created an attachment (id=21511)
intel_reg_dump when working