| Summary: | Mouse lag when using F16 kernels 3.3.2-1 or 3.3.1-5 | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Keegan Callin <kc> | ||||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 16 | CC: | gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2012-11-05 13:37:32 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Attachments: |
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Description
Keegan Callin
2012-04-21 03:16:37 UTC
Created attachment 579143 [details]
dmesg for a working version of kernel 3.1.0-7
Created attachment 579144 [details]
dmesg for a bugged version of the kernel, 3.3.2-1
You have a buggy PCI bridge. See bug 755956 [ 0.352798] pci 0000:07:00.0: Buggy bridge found [1b21:1080] [ 0.352799] pci 0000:07:00.0: Stuck interrupts will be polled and retried Fedora has a patch that tries to work around the broken hardware by switching to polling mode for interrupts. This works decently enough to keep the hardware from just being disabled, but it means you can get some laggy behaviour. Your particular machine doesn't seem to have anything behind that bridge though, which means the workaround is fairly pointless. We haven't found a great way to stop doing the quirk in this specific case yet. # Mass update to all open bugs. Kernel 3.6.2-1.fc16 has just been pushed to updates. This update is a significant rebase from the previous version. Please retest with this kernel, and let us know if your problem has been fixed. In the event that you have upgraded to a newer release and the bug you reported is still present, please change the version field to the newest release you have encountered the issue with. Before doing so, please ensure you are testing the latest kernel update in that release and attach any new and relevant information you may have gathered. If you are not the original bug reporter and you still experience this bug, please file a new report, as it is possible that you may be seeing a different problem. (Please don't clone this bug, a fresh bug referencing this bug in the comment is sufficient). [root@XXXXXXXXXX ~]# uname -a Linux grizzly 3.6.2-1.fc16.x86_64 #1 SMP Wed Oct 17 05:30:01 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux My system configuration has not changed since creating this ticket. After the new kernel the mouse lag has either disappeared or is so low that I do not notice it. Thanks for letting us know. |