Pavel Machek <pavel@xxxxxx> writes: > Hi! > > > > > Do you mean the dmesg output ? > > > > A full dmesg is included in this address : > > > > http://pastebin.com/8XU619Uk > > > > Not in all suspend/hibernate the problem comes, only in some of them > > > > and this included dmesg output is just after a non working case of > > > > webcam fault. > > > > > > > > > > > > I also have found this in `/var/log/messages | grep uvcvideo` > > > > Mar 31 00:31:16 linux-l365 kernel: [399905.714743] usbcore: > > > > deregistering interface driver uvcvideo > > > > Mar 31 00:31:24 linux-l365 kernel: [399914.121386] uvcvideo: Found UVC > > > > 1.00 device LG Webcam (0c45:62c0) > > > > Mar 31 00:31:24 linux-l365 kernel: [399914.135661] usbcore: registered > > > > new interface driver uvcvideo > > > > > > Also try unloading uvcvideo before suspend and reloading it after > > > resume... > > > > I have a similar problem with a Creative Optia webcam. > > > > I have found that removing the ehci_hcd module and reinserting it > > fixes the problem. > > > > If your kernel ships with ehci_hcd built-in (F11 and later), the > > script included also fixes the problem (it rebind the device). > > > > Of course, I'd love to see this issue fixed. > > If unload/reload of uvcvideo helps, it is most likely problem in that. > > If unload/reload of ehci_hcd is needed, it is most likely ehci problem. My testing shows that: 1. If I remove uvcvideo BEFORE suspend and reinsert it after resume, it works. However, I cannot always rmmod uvcvideo before suspend as it may be in use. 2. As a work around, removing ehci_hcd and reinserting ehci_hcd upon resume works as well. 3. Since my distribution's kernels come with ehci_hcd built into the kernel, and I cannot do #2 any more, I also found that unbinding and rebinding the device (with the script I sent earlier on) works as well. I think uvcvideo is failing to reinitialize the camera on resume, and forcing an uvcvideo "reset" with either of these three methods kicks uvcvideo into working again. Phil. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
