[linux-dvb] Consistent kernel crash on latest hg repo with 2.6.24-rc6

Erik van Zijst linux-dvb at erik.prutser.cx
Thu Jan 3 13:33:46 CET 2008


Solved!

It turned out the problem was in the external PCI adaptor I'm using to 
increase the (rather limited) number of legacy 32-bit PCI slots in my 
server system through a PCI-Express slot 
(http://www.virtuavia.eu/shop/pci-express-to-pci-expansion-box-p29809.html)

Although the card did get properly detected, it was very unstable, 
constantly crashing the kernel. I've removed the external PCI expansion 
box, plugged the card directly in the only on-board PCI slot and now it 
works perfectly stable.

Lessons learned: don't buy these external PCI expansion boxes.

Erik


Erik van Zijst wrote:
> Erik van Zijst wrote:
>> So far all tests have been done using 64 bit distro's and kernels.
> 
> I've just tried a fresh, vanilla 32-bit Ubuntu 7.10 install (kernel 
> 2.6.22-14), but this still exhibits the same kernel freeze (albeit after 
> a bit more time).
> 
> Could this somehow be a firmware issue, or should a firmware or badly 
> behaving card never crash the driver?
> 
> Erik
> 
> 
>> Erik van Zijst wrote:
>>> Hi folks,
>>>
>>> Since I installed a TechnoTrend 1500 Budget (with optional budget-ci CAM 
>>> board), my kernel crashes completely everytime I run a frequency scan 
>>> using the w_scan utility. There's no kernel panic message or anything 
>>> printed to the tty, just instant death.
>>>
>>> The server box (dual quadcore Xeon) ran perfectly stable until I 
>>> installed the T-1500 last week, and still runs stable as long as I don't 
>>> use the card.
>>>
>>> I started out using a stock 2.6.22-something kernel (vanilla Fedora 8 
>>> and Ubuntu 7.10 server), then switched to 2.6.24-rc6 (generated at 
>>> 2007-12-21) and finally tried today's trunk of 
>>> http://linuxtv.org/hg/v4l-dvb using hg, on top of my 2.6.24-rc6 kernel. 
>>> Yet, every combination dies.
>>>
>>> The kernel usually dies the first time "w_scan -x" 
>>> (http://wirbel.htpc-forum.de/w_scan/index2.html version 20071209) is run 
>>> and then usually dies near the end when w_scan prints "tune to:". 
>>> Occasionally it takes more than one run before it crashes. The box is 
>>> idle during the scan and there's no other PCI activity.
>>>
>>> I'm using firmware dvb-fe-tda10046.fw, installed using get_dvb_firmware.
>>>
>>> regards,
>>> Erik van Zijst
>>>
>>> _______________________________________________
>>> linux-dvb mailing list
>>> linux-dvb at linuxtv.org
>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>
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