On 21/03/12 17:09, Gary Buhrmaster wrote:
<conjecture>
Understood, and thanks for your insights.
Almost certainly a kernel usb issue. The 1900s and the APC device are likely victims, not the cause. These types of bug reports (the 'clear tt' ones) with usb devices have a tendency to reoccur on some irregular basis as the usb subsystem in the kernel gets improved. Usually the problem is patched in the next kernel rev (because others have reported it), although sometimes you have to do the git bisect to find the patch that was "special" to get it fixed.
Indeed my thoughts align with yours: the tuners are significant USB traffic generators which are probably more likely than other devices to expose weaknesses in the kernel USB subsystem. But I did google the kernel log messages without success (probably because they are so terse).
I recently upgraded from Ubuntu 10.10 to 11.04, and I had this problem under 10.10 as well. So the problem is not restricted to the 2.6.38 kernel in 11.04.
But I will try a more recent kernel as well before taking it to linux-usb if I still need to.
Thanks, Jan _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
