[cpia] Device is Busy

14 Nov 2001 21:11:30 -0500

Yes.  If the camera stops responding on /dev/video1, and I
unplug-then-plug, the camera then lives on /dev/video2.

On Wed, 2001-11-14 at 21:08, Axe wrote:
> When you disconnect it from the computer, and plug it back in are you able
> to reuse the device?  If I unplug it, I still get the 'device is busy'
> errors...
> (I forgot to mention, this is a USB cam)
> 
> 
> 
> ----- Original Message -----
> From: "George Talusan" <gstalusan@uwaterloo.ca>
> To: "Axe" <lists@killinghand.org>
> Cc: <cpia@risc.uni-linz.ac.at>
> Sent: Wednesday, November 14, 2001 12:33 AM
> Subject: Re: [cpia] Device is Busy
> 
> 
> > I have had the same problem as well for a long time now.  Unplugging the
> > camera and then plugging it back in seems to do the trick, except from
> > /dev/video{n} to /dev/video{n+1} each time.
> >
> > Debian.  Kernel 2.4.14 or cvs driver.  gqcam.  ABit BP6 2x466MHz.
> >
> >
> >
> > On Tue, 2001-11-13 at 22:51, Axe wrote:
> > > Anyone have a problem with attempting to drop pictures from a CPIA
> camera,
> > > and it randomly locking /dev/video*?
> > > For a few drops, it will work properly, but then poof... heh...it
> breaks..
> > > Even though the program exits (I use gqcam), /dev/video* stays 'busy',
> and
> > > you can't drop anymore frames.
> > > When I try to unload the modules, I can unload cpia_usb, cpia_pp, and
> > > parport.  But cpia and videodev won't unload due to getting a 'device is
> > > busy' error.  The only way I can get this "fixed" is by rebooting the
> > > machine.
> > > I'm using RH7.2 kernel version 2.4.9-13 (This has happened with RH7.0
> and
> > > 7.1 also).
> > > If anyone has any ideas, or needs more info, I'd be glad to hear it.
> > >
> > >
> > > This is the output from the messages file when I unload the three
> > > above-mentioned modules:
> > >
> > > Nov 13 21:42:05 gothic kernel: usb.c: deregistering driver cpia
> > > Nov 13 21:42:05 gothic kernel:
> > > cpia.c:cpia_unregister_camera_Rc7cb4e91(3243):/dev/video0 removed while
> > > open, deferring video_unregister_device
> > > Nov 13 21:42:05 gothic kernel: Unable to handle kernel paging request at
> > > virtual address c888e65a
> > > Nov 13 21:42:05 gothic kernel:  printing eip:
> > > Nov 13 21:42:05 gothic kernel: c888e65a
> > > Nov 13 21:42:05 gothic kernel: *pde = 014a9067
> > > Nov 13 21:42:05 gothic kernel: *pte = 00000000
> > > Nov 13 21:42:05 gothic kernel: Oops: 0000
> > > Nov 13 21:42:05 gothic kernel: CPU:    0
> > > Nov 13 21:42:05 gothic kernel: EIP:
> > > 0010:[sound:num_midis_Ra1eae7cf+243282/98532974]    Not tainted
> > > Nov 13 21:42:05 gothic kernel: EIP:    0010:[<c888e65a>]    Not tainted
> > > Nov 13 21:42:05 gothic kernel: EFLAGS: 00010286
> > > Nov 13 21:42:05 gothic kernel: eax: c70d94bc   ebx: c78f2200   ecx:
> 00000000
> > > edx: c70d94bc
> > > Nov 13 21:42:05 gothic kernel: esi: c70d94b0   edi: c89c0000   ebp:
> c1cac000
> > > esp: c1cadf10
> > > Nov 13 21:42:05 gothic kernel: ds: 0018   es: 0018   ss: 0018
> > > Nov 13 21:42:05 gothic kernel: Process gqcam (pid: 1626,
> stackpage=c1cad000)
> > > Nov 13 21:42:05 gothic kernel: Stack: c78f2200 000b170a c887f707
> c70d94b0
> > > c89c0000 00000000 00000000 c78f2208
> > > Nov 13 21:42:05 gothic kernel:        c78f2200 0004a400 40467008
> c887ff0b
> > > c78f2200 c1cac000 40467008 00000001
> > > Nov 13 21:42:05 gothic kernel:        0004b000 c15d6250 ffffffea
> 00000000
> > > 0004a400 c887a091 c78f22c0 40467008
> > > Nov 13 21:42:05 gothic kernel: Call Trace:
> > > [sound:num_midis_Ra1eae7cf+182015/98594241] __insmod_cpia_S.text_L16504
> > > [cpia] 0x26a7
> > > Nov 13 21:42:05 gothic kernel: Call Trace: [<c887f707>]
> > > __insmod_cpia_S.text_L16504 [cpia] 0x26a7
> > > Nov 13 21:42:05 gothic kernel:
> [sound:num_midis_Ra1eae7cf+184067/98592189]
> > > __insmod_cpia_S.text_L16504 [cpia] 0x2eab
> > > Nov 13 21:42:05 gothic kernel: [<c887ff0b>] __insmod_cpia_S.text_L16504
> > > [cpia] 0x2eab
> > > Nov 13 21:42:05 gothic kernel:
> [sound:num_midis_Ra1eae7cf+159881/98616375]
> > > __insmod_videodev_S.text_L2148 [videodev] 0x31
> > > Nov 13 21:42:05 gothic kernel: [<c887a091>]
> __insmod_videodev_S.text_L2148
> > > [videodev] 0x31
> > > Nov 13 21:42:05 gothic kernel: [sys_read+149/204] sys_read [kernel] 0x95
> > > Nov 13 21:42:05 gothic kernel: [<c0131b0d>] sys_read [kernel] 0x95
> > > Nov 13 21:42:05 gothic kernel: [sys_mremap+50/76] sys_mremap [kernel]
> 0x32
> > > Nov 13 21:42:05 gothic kernel: [<c0128646>] sys_mremap [kernel] 0x32
> > > Nov 13 21:42:05 gothic kernel: [sys_mremap+66/76] sys_mremap [kernel]
> 0x42
> > > Nov 13 21:42:05 gothic kernel: [<c0128656>] sys_mremap [kernel] 0x42
> > > Nov 13 21:42:05 gothic kernel: [system_call+51/56] system_call [kernel]
> 0x33
> > > Nov 13 21:42:06 gothic kernel: [<c0106e03>] system_call [kernel] 0x33
> > > Nov 13 21:42:06 gothic kernel:
> > > Nov 13 21:42:06 gothic kernel:
> > > Nov 13 21:42:06 gothic kernel: Code:  Bad EIP value.
> > >
> > >
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