Totally fatal system hang when using mencoder to record video from BT878 device
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
Binary package hint: linux-source-2.6.17
Using:
Linux 2.6.17-10-generic #2 SMP i686 GNU/Linux
Edgy-RC1
MEncoder 2:0.99+
listing this as an kernel problem not an mencoder problem due to the fact that the crash is so bad I can not even use ctrl-alt-sysRq keys to shut the system down somewhat gracefully.
how to reproduce
use mencoder to record from BT878 card
After a varying amount of time system will be totally frozen
information Gleened so far:
last crash was proceeded by the syslog spitting out the following info on all open terms.
message from syslog@localhost:
CPU 0
message from syslog@localhost:
EIP: is at freeblock +0x7d/0x100
message from syslog@localhost:
EAX: cacdc9000
EBX: dd956fa0
ECX: c5555000
EDX: bfbdbcbc
message from syslog@localhost:
ESI: c555414
EDI: dd959c40
EBP: dd95709
ESP: dd911efc
message from syslog@localhost:
DS: 007b
ES: 007b
SS: 0068
Sorry for the slightly truncated nature of the above had to write it down by hand before hitting the reset button. Checked /var/log/syslog.log and the error messages do not appear there.
what is almost universally in my logs just prior to the crash is something akin to:
[17182685.328000] usb 1-6.2: reset low speed USB device using ehci_hcd and address 3
Strangely messages similar to this have persisted even though I unplugged all low speed usb devices after seeing it the first few times and thinking it might be a hardware problem.
will now try removing the usb 2.0 hub just to be sure it is not the problem. But doubt it is the hub alone as the crash only occurs while recording
If you require more info. Or can tell me how to get a core.dump or backtrace out of such a brutal crash I'm all ears.
will also try using ffmpeg to record and see if it crashes there too.
| Freemor (freemor) wrote | #1 |
| description: | updated |
| Freemor (freemor) wrote | #2 |
| Freemor (freemor) wrote | #3 |
| Freemor (freemor) wrote | #4 |
| Andrew Ash (ash211) wrote | #5 |
| Changed in linux-source-2.6.17: | |
| status: | New → Incomplete |
| Freemor (freemor) wrote | #6 |
| Andrew Ash (ash211) wrote | #7 |
| Changed in linux-source-2.6.17: | |
| status: | Incomplete → Invalid |
More info and another spew
the low speed usb device turned out to be my mouse <sigh>
so unplugged the mouse and tried recording with mencoder
as encoding proceeded there was increasing system wait times
then the following spew and the expected fatal crash
kernel: call trace
kernel: <c0166957> drain_array+
kernel: <c0132702> run_workqueue+
kernel: <c01332e7> worker_
kernel: <c01331d0> worker_
kernel: <co135ee0> kthread+0x0/0xe0 <c0101005> kernel_
code:
75 00 8d 96 00 00 00 40 c1 ea 0c c1 e2 05 03 15 00 cc 47 c0 8b 02 f6 c4 40 75 7f 8b 4a 1c 8b 44 24 20 8b 11 8b 5c 87 30 8b 41 04 <89> 42 04 89 10 31 d2 2b 71 0c c7 01 00 01 10 00 c7 41 04 00 02
EIP: [free_block+
I've attached the various bits that made it into the logs and the names logs the bits are from .