On 20.09.2011 03:29, Remco Rijnders wrote: > On Thu, Sep 08, 2011 at 08:53:19AM +0200, Alexey wrote in > <4e68665f.3090...@fisher-privat.net>: >> Am 08.09.2011 08:07, schrieb Remco Rijnders: >>> On Thu, Sep 08, 2011 at 07:49:00AM +0200, Alexey wrote in >>> <4e68574c.6020...@fisher-privat.net>: >>>> Hi, >>>> >>>> to get the idea of what is wrong here, we need at least dmesg. If you >>>> can't provide dmesg, but you can compile kernel, do git bisect. >>> >> >> You can use netconsole: >> http://www.tocpcs.com/howto-log-a-kernel-panic-it-can-be-done/ >> >> or attach usb-serial adapter and log the dmegs over serial on other >> computer >> For both his methods you need second computer. >> >> or boot in verbose mode, no splash screen or so, and make a photo of >> log from display. Here you will need only one computer. > > Hi, > > Apologies for the late revert. I've been busy with other things and > spent too much time on trying to get netconsole working without luck. > Anyways, using git bisect I came to the following result: > > [remmy@ketelbinkie uvcvideo]$ git bisect bad > a96aa5342d575980e5b572cde88036f3a878ebee is the first bad > commit > > commit > a96aa5342d575980e5b572cde88036f3a878ebee > > > Author: Laurent Pinchart > <laurent.pinch...@ideasonboard.com> > > > Date: Tue Jun 28 18:17:48 2011 > -0300 > > > > > > [media] uvcvideo: Ignore entities for terminals with no supported > format > > > > > If a streaming interface has no supported format, the driver > won't > > create a video device for the associated terminal. Fix an oops > by > > ignoring that terminal when creating links between > entities. > > > > > Signed-off-by: Laurent Pinchart > <laurent.pinch...@ideasonboard.com> > > > Signed-off-by: Mauro Carvalho Chehab > <mche...@redhat.com> > > > > > > :040000 040000 0296cc04d3923f1f93205ac6164802b514ad3162 > b4753a4e36122dc9605bcb44caa4aa1328146d0d M drivers > > I'm not 100% sure that this is the proper commit as the kernel crashes > at a later point (at the KDM login screen) than in my initial > observation where it would not even complete booting. > > Furthermore, while doing the git bisect good thing, at the last point I > had to do "make CONFIG_DEBUG_SECTION_MISMATCH=y" as the kernel would not > compile without it anymore. > > That said, I notice that the kernel panic this kernel resulted in is > very similar to that which gudvinr reported on the 11th, also with an > ASUS system so I am beginning to see a pattern there. > > Some fuzzy screenshots: > > http://milkzilla.webconquest.com/~remmy/UVC/1.jpg > http://milkzilla.webconquest.com/~remmy/UVC/2.jpg > > Please let me know if I can do anything further to help debug this. For > now I have disabled the camera in the bios which allows me to otherwise > use the computer as normal but I suspect there are quite a few people > out there who bump into similar issues. > > Thanks and regards,
Can you please try this patch? Regards, Alexey
diff --git a/drivers/media/video/uvc/uvc_entity.c b/drivers/media/video/uvc/uvc_entity.c index 48fea37..29e2399 100644 --- a/drivers/media/video/uvc/uvc_entity.c +++ b/drivers/media/video/uvc/uvc_entity.c @@ -49,7 +49,7 @@ static int uvc_mc_register_entity(struct uvc_video_chain *chain, if (remote == NULL) return -EINVAL; - source = (UVC_ENTITY_TYPE(remote) != UVC_TT_STREAMING) + source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING) ? (remote->vdev ? &remote->vdev->entity : NULL) : &remote->subdev.entity; if (source == NULL)
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