Description of problem: Roughly every 5-20 minutes or so (give or take) my Dell Adamo 13 (black) will hard lock. The last messages in the syslog before the reboot (consistently) are: Jan 1 14:03:33 emma kernel: [ 350.187460] iwlagn 0000:04:00.0: BA scd_flow 0 does not match txq_id 10 Jan 1 14:03:35 emma kernel: [ 352.917520] iwlagn 0000:04:00.0: low ack count detected, restart firmware Jan 1 14:03:35 emma kernel: [ 352.917531] iwlagn 0000:04:00.0: On demand firmware reload Jan 1 14:03:35 emma kernel: [ 352.972646] iwlagn 0000:04:00.0: Stopping AGG while state not ON or starting Jan 1 14:03:35 emma kernel: [ 352.972656] iwlagn 0000:04:00.0: queue number out of range: 0, must be 10 to 19 Jan 1 14:04:42 emma kernel: imklog 4.6.3, log source = /proc/kmsg started. [boot continues as normal] Version-Release number of selected component (if applicable): 2.6.35.10-74.fc14.x86_64 How reproducible: Inconsistent (I believe without better evidence that it's a faulty response to some kind of palpable change in the wifi environment), but when it happens it always has the same/similar log messages (or sometimes the "AGG" line is cut-off halfway) I'm willing to run a kdump kernel until I have a legit trace for this (having to randomly reboot my primary machine every 5 minutes makes this a priority for me), but will need instructions. Steps to Reproduce: 1. Boot System 2. Wait. 3. Randomly loose the code you were working on for the last couple minutes. Actual results: Crashy fun time. Expected results: Boring work. Additional info: I'm a Leo. Wait, did you mean additional info about the problem? In that case, if audio is playing it replays the last couple seconds of buffer on a loop until I button-for-7s the machine---audio is not always playing, however.
There are two patches that may help: https://bugzilla.kernel.org/attachment.cgi?id=38502 http://marc.info/?l=linux-wireless&m=129310430012942&w=2 I will prepare test kernel with them ...
Please test both these kernels and share your impression: http://koji.fedoraproject.org/koji/taskinfo?taskID=2697824 http://koji.fedoraproject.org/koji/taskinfo?taskID=2698228
I'm affected by the same problem, installing kernel from http://koji.fedoraproject.org/koji/taskinfo?taskID=2698228 now.
This kernel fixes the problem for me (didn't test the other build). [khautio@kha ~]$ uname -a Linux kha 2.6.35.10-75.irq.fc14.i686 #1 SMP Mon Jan 3 14:49:06 UTC 2011 i686 i686 i386 GNU/Linux
The irq build didn't fix my issue, I'm trying the low_ack kernel now. Jan 4 16:01:07 emma kernel: [ 0.000000] Linux version 2.6.35.10-75.irq.fc14.x86_64 (mockbuild.fedoraproject.org) (gcc version 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) ) #1 SMP Mon Jan 3 14:34:56 UTC 2011 [...] Jan 4 17:37:37 emma kernel: [ 5810.255040] iwlagn 0000:04:00.0: iwlagn_tx_agg_start on ra = 00:25:9c:d2:4d:a0 tid = 0 Jan 4 17:37:44 emma kernel: [ 5816.994056] iwlagn 0000:04:00.0: BA scd_flow 0 does not match txq_id 10 Jan 4 17:37:45 emma kernel: [ 5818.095818] iwlagn 0000:04:00.0: BA scd_flow 0 does not match txq_id 10 Jan 4 17:37:46 emma kernel: [ 5819.064689] iwlagn 0000:04:00.0: low ack count detected, restart firmware Jan 4 17:37:46 emma kernel: [ 5819.064701] iwlagn 0000:04:00.0: On demand firmware reload Jan 4 17:37:46 emma kernel: [ 5819.119974] iwlagn 0000:04:00.0: Stopping AGG while state not ON or starting Jan 4 17:37:46 emma kernel: [ 5819.119986] iwlagn 0000:04:00.0: queue number out of range: 0, must be 10 to 19 Jan 4 17:38:01 emma kernel: [ 5834.658906] iwlagn 0000:04:00.0: iwlagn_tx_agg_start on ra = 00:25:9c:d2:4d:a0 tid = 0 Jan 4 17:38:04 emma kernel: [ 5837.085846] iwlagn 0000:04:00.0: low ack count detected, restart firmware Jan 4 17:38:04 emma kernel: [ 5837.085853] iwlagn 0000:04:00.0: On demand firmware reload Jan 4 17:38:04 emma kernel: [ 5837.136528] iwlagn 0000:04:00.0: Stopping AGG while state not ON or starting Jan 4 17:38:04 emma kernel: [ 5837.136535] iwlagn 0000:04:00.0: queue number out of range: 0, must be 10 to 19 Jan 4 17:42:51 emma kernel: imklog 4.6.3, log source = /proc/kmsg started.
There is other similar bug 667459 report, that point the hard lock problem is on mac80211 layer. Please test this kernel and report back: http://koji.fedoraproject.org/koji/taskinfo?taskID=2704610
James, any news on comment 6 (also you can try official build with patch http://koji.fedoraproject.org/koji/buildinfo?buildID=213595 if you wish).
I haven't tested the comment 6 build yet---it will be another week before I can, unfortunately---but I did see the same problem with the low_ack kernel.
Please save packages you need from comment 6 as koji can remove these files automaticly. With low_ack kernel at least :low ack count detected, restart firmware" should gone.
Got it, thanks.
I'm going to test comment 7 build now
Kari and/or James could you test driver from upstream with some my patches: https://bugzilla.redhat.com/show_bug.cgi?id=648732#c21
Posted to fedora and stable. http://lists.fedoraproject.org/pipermail/kernel/2011-May/003091.html
kernel-2.6.38.6-27.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/kernel-2.6.38.6-27.fc15
Package kernel-2.6.38.6-27.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kernel-2.6.38.6-27.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/kernel-2.6.38.6-27.fc15 then log in and leave karma (feedback).
kernel-2.6.38.6-27.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.
kernel-2.6.35.14-95.fc14 has been submitted as an update for Fedora 14. https://admin.fedoraproject.org/updates/kernel-2.6.35.14-95.fc14
kernel-2.6.35.14-95.fc14 has been pushed to the Fedora 14 stable repository. If problems still persist, please make note of it in this bug report.