kernel drm latency on intel video playback
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
Linux olkka 2.6.35-22-generic #34-Ubuntu SMP Sun Oct 10 09:24:00 UTC 2010 i686 GNU/Linux
Playing video (dvd or avi) results a stalls in video output. Approximately in once in ten seconds the video freezes for
a very short while, less than a second.
Using 'top' this stall occurs in parallel with 'slowd' taking 8% of cpu:
759 root 15 -5 0 0 0 S 8 0.0 0:14.68 kslowd000
With the following hack patch, video playback is smooth again:
--- drm_crtc_helper.c~ 2010-09-29 04:09:08.000000000 +0300
+++ drm_crtc_helper.c 2010-10-09 20:07:36.111996829 +0300
@@ -810,7 +810,7 @@
static struct slow_work_ops output_poll_ops;
-#define DRM_OUTPUT_
+#define DRM_OUTPUT_
static void output_
{
struct delayed_slow_work *delayed_work = container_of(work, struct delayed_slow_work, work);
I suppose the following commit fixes this same issue in upstream:
http://
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-
Regression: Yes
Reproducible: Yes
ProcVersionSign
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/
CRDA: Error: [Errno 2] Tiedostoa tai hakemistoa ei ole
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0x50440000 irq 43'
Mixer name : 'SigmaTel STAC9221 A1'
Components : 'HDA:83847680,
Controls : 18
Simple ctrls : 10
Date: Wed Oct 13 01:23:47 2010
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate i386 (20100928)
MachineType: Apple Inc. Macmini2,1
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANG=fi_FI.utf8
SHELL=/bin/bash
RelatedPackageV
SourcePackage: linux
dmi.bios.date: 06/28/07
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MM21.88Z.
dmi.board.
dmi.board.name: Mac-F4208EAA
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.
dmi.chassis.type: 4
dmi.chassis.vendor: Apple Inc.
dmi.chassis.
dmi.modalias: dmi:bvnAppleInc
dmi.product.name: Macmini2,1
dmi.product.
dmi.sys.vendor: Apple Inc.
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: | removed: regression-potential |
Mika Kuoppala, thank you for reporting this and helping make Ubuntu better. Maverick reached EOL on April 10, 2012. /wiki.ubuntu. com/Releases
Please see this document for currently supported Ubuntu releases:
https:/
We were wondering if this is still an issue in a supported release? If so, can you try with the latest development release of Ubuntu? ISO CD images are available from http:// cdimage. ubuntu. com/releases/ .
If it remains an issue, could you run the following command in a supported release from a Terminal (Applications- >Accessories- >Terminal) . It will automatically gather and attach updated debug information to this report.
apport-collect -p linux <replace- with-bug- number>
Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https:/ /wiki.ubuntu. com/KernelMainl ineBuilds . Once you've tested the upstream kernel, please remove the 'needs- upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs- upstream- testing' text.
If this bug is fixed in the mainline kernel, please add the following tag 'kernel- fixed-upstream' .
If the mainline kernel does not fix this bug, please add the tag: 'kernel- bug-exists- upstream' .
If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel- unable- to-test- upstream' .
Please let us know your results. Thanks in advance.