Hi Mathias, On Tue, Mar 3, 2015 at 8:40 PM, Alistair Grant <akgrant0710@xxxxxxxxx> wrote: > Hi Mathias, > > On Tue, Mar 3, 2015 at 2:21 PM, Mathias Nyman > <mathias.nyman@xxxxxxxxxxxxxxx> wrote: >> On 28.02.2015 09:16, Alistair Grant wrote: >>> ... >>> * 3.19.0 with the following patches: >>> * xhci: Allocate correct amount of scratchpad buffers >>> * xhci: Don't touch TRBs memory if those are no longer on the endpoint ring >>> * xhci: fix invalid pointer in reset device debugging >>> * xhci: add debugging for reset device and stop endpoint commands >>> * xhci: add command ring stop and restart debug messages >>> >> >> Does increasing the TRB count per segment help? > > Success! > > Increasing TRBS_PER_SEGMENT from 64 to 256 allowed me to successfully > record two 30 second segments of video, i.e. start recording with > mythffmpeg, Ctrl-C after 30 seconds, then repeat (this is on top of the > patched kernel I reported in my last message). > > This obviously is good news, it is also better than I typically saw using > the ehci driver, as often the second attempt would fail with a "Device or > Resource Busy" message (of course a single test is hardly conclusive, and > it may still appear). > > It's getting a bit late here, so hopefully tomorrow I'll try recording for > a longer period of time to make sure that succeeds as well. > > Included below is the syslog from the time I plugged the Live2 in to > unplugging it after recording. There are three types of messages which > don't look completely normal to me: I was able to record video for 1 hour today, and then stop and start recording another 3 times - just a few seconds each, this was more about ensuring it could stop and start multiple times. I assume that this is a workaround, and that the core problem of ring expansion & cancelled URBs is still to be resolved. Let me know if you would like that tested when it is ready. 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
