On Wed, Sep 12, 2012 at 11:19:42AM -0700, Oleg Rombakh wrote: > Hi, > > I am working on the project that involves USB3, 3.0 kernel, and WebCams. > > One of our h/w platforms utilizes NEC uPD720200 USB3 chipset. > > The image we run is based on SUSE 11SP2 (kernel 3.0.38) and on this > kernel we experience problem with web cameras attached to USB3. The > same cameras work on USB2. > Sometimes dmesg contains a message such as: Transfer event TRB DMA ptr > not part of current TD > But most of the time, cameras silently fail to communicate with Cheese > application (curiously enough a built-in mic on these cameras always > work). > On the other hand we do have a platform that uses essentially the > same H/W (PCB and BIOS are different, but from components perspective > both platforms are very close). On this second platform with the > exactly same image all USB web cams work. > > While looking around I found patch > http://git.kernel.org/?p=linux/kernel/git/sarah/xhci.git;a=commit;h=50d0206fcaea3e736f912fd5b00ec6233fb4ce44 > The e-mail says that this patch should be backported to older kernels. > Is there a patch for 3.0.y kernel, that I can try? > Unfortunately http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=tree;h=refs/heads/linux-3.0.y;hb=refs/heads/linux-3.0.y > does not have it. Yes, a known issue, I have asked Sarah for a backported version for 3.0, but she was on vacation at the time. If you could create it, and test that it works properly for your systems, that would be a wonderful help. Can you? thanks, greg k-h -- 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
