drm:i915_driver_irq_handler: too many events received

[Endre Kollár]

Shortly after boot, so many events happen, that is why the mouse cursor is lagging.

It is strongly related: https://bugzilla.redhat.com/show_bug.cgi?id=528312

Kernel started with drm.debug=0x02 parameter.

Events located in the "kern.log hotplug events" attachment.

Sample hotplug event:
[drm:i915_driver_irq_handler], hotplug event received, stat 0x08020000

Statistics:

Number of events: 19985
Start timestamp:74.097174s
End timestamp:112.103787s
Duration:38s
Frequency:526 events/sec

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-34-generic 3.2.0-34.53
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
Uname: Linux 3.2.0-34-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC270 Analog [ALC270 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu15
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC270 Analog [ALC270 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: klari-forendszergazda 2810 F.... xfce4-volumed
                      klari-forendszergazda 2822 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd4500000 irq 45'
   Mixer name : 'Realtek ALC270'
   Components : 'HDA:10ec0270,103c1605,00100100'
   Controls : 19
   Simple ctrls : 11
Date: Sat Dec 8 18:20:28 2012
HibernationDevice: RESUME=UUID=6c7faf66-4a13-4252-8ec8-7982f94f7515
MachineType: Hewlett-Packard Presario CQ56 Notebook PC
MarkForUpload: True
ProcEnviron:
 LANGUAGE=hu:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=hu_HU.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-34-generic root=UUID=83582329-f7e4-489e-bb84-ea4e95daba90 ro quiet splash drm.debug=0x02 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-34-generic N/A
 linux-backports-modules-3.2.0-34-generic N/A
 linux-firmware 1.79.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/07/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.15
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1605
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 90.17
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.15:bd04/07/2011:svnHewlett-Packard:pnPresarioCQ56NotebookPC:pvr059D110000002810010000000:rvnHewlett-Packard:rn1605:rvr90.17:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: Presario CQ56 Notebook PC
dmi.product.version: 059D110000002810010000000
dmi.sys.vendor: Hewlett-Packard

[Brad Figg (brad-figg)]

This change was made by a bot.

[Endre Kollár (taxy443)]

Corrected version:
I assume because of the duplication, that the mainline kernel does not fix this bug .
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1087677/comments/4
It is difficult and lengthy to reproduce the bug.

[Jonatã Bolzan Loss (jbopen)]

It seems that a related bug in kernel was fixed (link above). Does installing the kernel 3.10 fix the problem?

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b543fb0464ddf30a5b554957fd212eb7a2acac65

To install it:
cd /tmp
wget http://ubuntued.info/kernels/kernel-3.10.0 -O kernel-3.10.0
chmod +x kernel-3.10.0
sudo sh kernel-3.10.0