DVB Nova-T video skips with "cx88_wakeup: 2 buffers handled (should be 1)"
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned | ||
linux-source-2.6.20 (Ubuntu) |
Won't Fix
|
Medium
|
Unassigned |
Bug Description
Binary package hint: linux-image-
[I have reported this problem upstream to the linux-dvb mailing list.
http://
Alas, not a single response there. So this may be specific to the Ubuntu kernel.]
Hi,
using a Nova-T dvb card, I get the following in /var/log/
22:09:54 kernel: cx88_wakeup: 2 buffers handled (should be 1)
22:09:57 kernel: cx88_wakeup: 2 buffers handled (should be 1)
22:10:06 kernel: cx88_wakeup: 2 buffers handled (should be 1)
22:10:09 kernel: cx88_wakeup: 2 buffers handled (should be 1)
22:10:12 kernel: cx88_wakeup: 2 buffers handled (should be 1)
22:10:15 kernel: cx88_wakeup: 2 buffers handled (should be 1)
...every few seconds while watching TV with xine or other dvb-apps. The
event results in a visible interruption of the video stream.
Looking on the net for solutions, I found these suggestions:
- changing PCI latency in the BIOS settings
- putting the card into a different PCI slot
- using "pci=routeirq" or "pci=noacpi" kernel boot parameters
I tried all these, but it did NOT help.
So, where should I look for solutions now?
The system is an Intel 965 chipset mainboard, running a default Ubuntu
"Feisty" 7.04 with its stock kernel (package 2.6.20-15-generic).
The dvb card is fine, it works without these problems with a different
mainboard and the same Linux distribution.
Hope this info helps:
-------
# egrep "CPU|cx88" /proc/interrupts
CPU0 CPU1
23: 21861 407216 IO-APIC-fasteoi cx88[0], cx88[0], HDA Intel
-------
# lspci -v
07:01.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video
and Audio
Subsystem: Hauppauge computer works Inc. Unknown device 9002
Flags: bus master, medium devsel, latency 64, IRQ 23
Memory at 92000000 (32-bit, non-prefetchable) [size=16M]
07:01.2 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and
Audio Decode
Subsystem: Hauppauge computer works Inc. Nova-T DVB-T Model 909
Flags: bus master, medium devsel, latency 64, IRQ 23
Memory at 91000000 (32-bit, non-prefetchable) [size=16M]
07:01.4 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and
Audio Decode
Subsystem: Hauppauge computer works Inc. Nova-T DVB-T Model 909
Flags: bus master, medium devsel, latency 64, IRQ 10
Memory at 90000000 (32-bit, non-prefetchable) [size=16M]
-------
Changed in linux-source-2.6.20: | |
assignee: | nobody → ubuntu-kernel-team |
Changed in linux-source-2.6.20: | |
status: | Confirmed → Triaged |
Thanks for taking the time to report this bug. Unfortunately we can't fix it, because your description doesn't yet have enough information.
Please include the following additional information, if you have not already done so (please pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
1. Please include the output of the command "uname -a" in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command "dmesg > dmesg.log" and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.
For your reference, the full description of procedures for kernel-related bug reports is available at [WWW] http:// wiki.ubuntu. com/KernelTeamB ugPolicies. Thanks in advance!