Hi Matthias, On Thu, Jan 22, 2015 at 12:22 PM, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > On 21.01.2015 21:16, Alistair Grant wrote: >> Hi Matthias, >> >> On Tue, Jan 20, 2015 at 10:22 AM, Mathias Nyman >> <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >>> On 19.01.2015 22:02, Devin Heitmueller wrote: >>>> Hi Mathias, >>>> >>>> Thanks for getting back to me. >>>> >>>>> There are a couple of xhci bugs triggered by dvb devices: >>>>> https://bugzilla.kernel.org/show_bug.cgi?id=75521 >>>>> https://bugzilla.kernel.org/show_bug.cgi?id=65021 >>>>> >>>>> The first one (75521) I believe is mostly fixed by patches in 3.18 and early >>>>> 3.19-rc, so work on a 3.19-rc kernel to eliminate those issues. >>>> ... >>>>> The second bug (65021) looks more like your case, it queues two stop_endpoints >>>>> commands almost simultaneously, which end up never completing, ->timeout and tear down xhci. >>>>> That bug has a debug patch for command ring status, you could try it out to check if >>>>> the command queue is running among other details. >>>> >>>> The second bug definitely looks like what I'm seeing. I'll try your >>>> tree and report back my findings. >>> >>> Ah, let me rebase that tree on top of a more current kernel first. >> >> I've been following this as it somewhat resembles the problems I'm >> experiencing, which I've just formally reported in "Hauppauge >> USB-Live2 recording fails on USB3 port". >> >> It looks like you did the rebase yesterday, so I tried running your >> updated kernel. It didn't solve the problems, but was an incremental >> improvement since the mainline 3.19rc5 kernel hangs during shutdown, >> while your modified kernel shutdown cleanly. >> >> I've got a syslog with verbose xhci logging (echo -n 'module xhci_hcd >> =p' > /sys/kernel/debug/dynamic_debug/control as you suggested above) >> if you would like to take a look. It's 2.4M so please let me know how >> you would like me to pass it on. > > I'm Interested yes, anyway is fine. Add it somewhere (bugreport, webpage) and send me the link, > or just sending it as an email attachent to me works fine as well. You should be able to download it from: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1412121/+attachment/4303563/+files/syslog-14.10-3.19rc5mathias0.2-2.log Please let me know if you have any trouble accessing it, or would like more testing, information, etc. Thanks, Alistair -- 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
