On Sat, Nov 03, 2012 at 03:16:36PM +0100, Daniel Mack wrote: > On 03.11.2012 15:10, Christof Meerwald wrote: > > http://comments.gmane.org/gmane.comp.voip.twinkle/3052 and > > http://pastebin.com/aHGe1S1X for a self-contained C test. > Some questions: > > - Are you seeing the same issue with 3.6.x? I haven't tried it myself, but the other poster on http://comments.gmane.org/gmane.comp.voip.twinkle/3052 mentions 3.6.2 (and 3.6.3) > - If you can reproduce this issue, could you paste the messages in > dmesg when this happens? Do they resemble to the list corruption that > was reported? I am not seeing any kernel messages at all - the system just freezes and not even the SysRq stuff works after that. > - Do you see the same problem with 3.4? I upgraded from Ubuntu 12.04 (Linux 3.2) where I didn't see the problem. However, http://www.linuxquestions.org/questions/linux-desktop-74/twinkle-causes-linux-freeze-kernel-3-6-2-a-4175433799/ mentions 3.4.0 > - Are you able to apply the patch Alan Stern posted in this thread earlier? Unfortunately, I am not really in a position to apply kernel patches at the moment. > We should really sort this out, but I unfortunately lack a system or > setup that shows the bug. BTW, I have been able to reproduce the problem on a completely different machine (also running Ubuntu 12.10, but different hardware). The important thing appears to be that the USB audio device is connected via a USB 2.0 hub (and then using the test code posted in http://pastebin.com/aHGe1S1X specifying the audio device as "plughw:Set" (or whatever it's called) seems to trigger the freeze). So I guess another question is: do you have a USB headset connected via a USB 2.0 hub and not seeing the problem or is your USB headset not connected via a USB 2.0 hub? (of course, it would also be useful if others could comment if they are seeing the problem with that setup or not) Christof -- http://cmeerw.org sip:cmeerw at cmeerw.org mailto:cmeerw at cmeerw.org xmpp:cmeerw at cmeerw.org -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
