I just installed a fresh Natty on my brand new Thinkpad X220. Everything works quite fine, except for that I'm experiencing "micro hangs" in the X server: Every few seconds, the system seems to hang for about 0.5-1 seconds, but then resumes normal operation, filling in typed characters from the buffer or completing the current mouse movement.
Whenever this phenomenon occurs, I get the following line in /var/log/syslog:
Jun 8 17:36:31 tango kernel: [19380.993923] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 7717165, at 7717165], missed IRQ?
Jun 8 17:36:41 tango kernel: [19390.990968] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 7724235, at 7724235], missed IRQ?
Jun 8 17:36:55 tango kernel: [19404.493498] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 7739750, at 7739750], missed IRQ?
Jun 8 17:36:57 tango kernel: [19406.990282] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 7740994, at 7740994], missed IRQ?
…
The issue occurs through the whole runtime of the system with an interval between 1 and 10 seconds. Hangs are between 0.5 and 2 seconds. Any input that occurs during the hang (typing, mouse movement) is processed as soon as the hang is over. For every hang, I register a log entry as shown above. There are no further log entries in a similar direction.
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dotxp 2030 F.... pulseaudio
/dev/snd/pcmC0D0p: dotxp 2030 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xd2620000 irq 48'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:14f1506e,17aa21da,00100000 HDA:80862805,80860101,00100000'
Controls : 20
Simple ctrls : 8
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
Mixer name : 'ThinkPad EC (unknown)'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
DistroRelease: Ubuntu 11.04
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: LENOVO 4287CTO
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=a75d277a-fe48-407e-8aeb-9459042f48c5 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic N/A
linux-backports-modules-2.6.38-8-generic N/A
linux-firmware 1.52
Tags: natty running-unity
Uname: Linux 2.6.38-8-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 04/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET42WW (1.12 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4287CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET42WW(1.12):bd04/01/2011:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4287CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
apport information