On Tue, 13 Oct 2009, [UTF-8] Ozan Ã?aÄ?layan wrote: > Hi, > > Some recent netbooks (Some MSI winds and LG X110's) equipped with an > integrated webcam have non-working USB ports unless the uvcvideo module > is blacklisted. I've found some bug reports in launchpad: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/435352 > > I have an LG X110 on which I can reproduce the problem with 2.6.30.8. > Here's the interesting part in dmesg: > > Oct 13 08:46:32 x110 kernel: [ 261.048312] uvcvideo: Found UVC 1.00 > device BisonCam, NB Pro (5986:0203) > Oct 13 08:46:32 x110 kernel: [ 261.053592] input: BisonCam, NB Pro as > /devices/pci0000:00/0000:00:1d.7/usb1/1-5/1-5:1.0/input/input10 > Oct 13 08:46:32 x110 kernel: [ 261.053891] usbcore: registered new > interface driver uvcvideo > Oct 13 08:46:32 x110 kernel: [ 261.054755] USB Video Class driver (v0.1.0) > Oct 13 08:46:32 x110 kernel: [ 261.091014] ehci_hcd 0000:00:1d.7: force > halt; handhake f807c024 00004000 00000000 -> -110 Can you add a dump_stack() call just after the ehci_err() line in drivers/usb/host/ehci-hcd.c:handshake_on_error_set_halt()? It should provide some clues. At the same time (i.e., during the same test) you should collect a usbmon trace. Alan Stern -- 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
