Re: Question about Creative Webcam Pro PD1030 ? Bug ?

On Fri, 11 Apr 2008 00:35:15 +0200 (CEST)
linuxcbon <linuxcbon@xxxxxxxx> wrote:

Hi,

sorry if this is not the correct mail list.

I am not sure if this is a bug, if someone can help me ?

I got a Creative Webcam Pro PD1030.

Drivers are loaded :
# dmesg |grep ov511
drivers/media/video/ov511.c: USB OV511+ video device found
drivers/media/video/ov511.c: model: Creative Labs WebCam 3
drivers/media/video/ov511.c: Sensor is an OV7620AE
drivers/media/video/ov511.c: Enabling 511+/7620AE workaround
drivers/media/video/ov511.c: Device at usb-0000:00:02.0-2 registered to
minor 0
usbcore: registered new interface driver ov511
drivers/media/video/ov511.c: v1.64 for Linux 2.5 : ov511 USB Camera Driver


lsmod gives :
ov511 77072 0
squashfs 46856 0
compat_ioctl32 1408 1 ov511
videodev 27904 1 ov511
v4l2_common 16896 1 videodev
v4l1_compat 14596 1 videodev
usbcore 127128 6 usb_storage,usblp,ov511,ehci_hcd,ohci_hcd

# uname -a
Linux puppypc 2.6.21.7 #1 Sun Feb 24 10:22:08 GMT-8 2008 i686 GNU/Linux


I try for testing
cat /dev/video > video.avi

I got :

cat: /dev/video*** glibc detected *** cat: free(): invalid next size
(fast): 0x08050ab8 ***
======= Backtrace: =========
/lib/libc.so.6[0xb7f4140e]
/lib/libc.so.6(cfree+0xa9)[0xb7f42bdd]
/lib/libc.so.6[0xb7f1088c]
/lib/libc.so.6[0xb7f0f0ef]
/lib/libc.so.6[0xb7f0edcf]
/lib/libc.so.6(dcgettext+0x24)[0xb7f0e030]
/lib/libc.so.6(__strerror_r+0xc9)[0xb7f46b19]
/lib/libc.so.6[0xb7f89d37]
/lib/libc.so.6(error+0x89)[0xb7f89f38]
cat[0x8049321]
/lib/libc.so.6(__libc_start_main+0x12e)[0xb7f0420e]
cat[0x8048c5d]
======= Memory map: ========
08048000-0804c000 r-xp 00000000 16:05 304622 /bin/cat
0804c000-0804d000 rw-p 00003000 16:05 304622 /bin/cat
0804d000-0806e000 rw-p 0804d000 00:00 0 [heap]
b7d00000-b7d21000 rw-p b7d00000 00:00 0
b7d21000-b7e00000 ---p b7d21000 00:00 0
b7ea1000-b7eaa000 r-xp 00000000 16:05 502230 /usr/lib/libgcc_s.so.1
b7eaa000-b7eab000 rw-p 00008000 16:05 502230 /usr/lib/libgcc_s.so.1
b7eab000-b7ede000 r--p 00000000 16:05 498627
/usr/lib/locale/en_US/LC_CTYPE
b7ede000-b7edf000 r--p 00000000 16:05 498634
/usr/lib/locale/en_US/LC_NUMERIC
b7edf000-b7ee0000 r--p 00000000 16:05 498637
/usr/lib/locale/en_US/LC_TIME
b7ee0000-b7ee5000 r--p 00000000 16:05 498626
/usr/lib/locale/en_US/LC_COLLATE
b7ee5000-b7ee6000 r--p 00000000 16:05 498632
/usr/lib/locale/en_US/LC_MONETARY
b7ee6000-b7ee7000 r--p 00000000 16:05 498631
/usr/lib/locale/en_US/LC_MESSAGES/SYS_LC_MESSAGES
b7ee7000-b7ee8000 r--p 00000000 16:05 498635
/usr/lib/locale/en_US/LC_PAPER
b7ee8000-b7ee9000 r--p 00000000 16:05 498633
/usr/lib/locale/en_US/LC_NAME
b7ee9000-b7eea000 r--p 00000000 16:05 498625
/usr/lib/locale/en_US/LC_ADDRESS
b7eea000-b7eeb000 r--p 00000000 16:05 498636
/usr/lib/locale/en_US/LC_TELEPHONE
b7eeb000-b7eec000 r--p 00000000 16:05 498629
/usr/lib/locale/en_US/LC_MEASUREMENT
b7eec000-b7eed000 r--p 00000000 16:05 498628
/usr/lib/locale/en_US/LC_IDENTIFICATION
b7eed000-b7eee000 rw-p b7eed000 00:00 0
b7eee000-b7fe3000 r-xp 00000000 16:05 16065 /lib/libc-2.6.1.so
b7fe3000-b7fe4000 r--p 000f5000 16:05 16065 /lib/libc-2.6.1.so
b7fe4000-b7fe6000 rw-p 000f6000 16:05 16065 /lib/libc-2.6.1.so
b7fe6000-b7fea000 rw-p b7fe6000 00:00 0
b7fea000-b7fff000 r-xp 00000000 16:05 16055 /lib/ld-2.6.1.so
b7fff000-b8001000 rw-p 00014000 16:05 16055 /lib/ld-2.6.1.so
bf808000-bf81e000 rw-p bf808000 00:00 0 [stack]
ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
Aborted


I also got problems to use webcam with skype etc.
Can you help find the origin of the bug ?

Thanks very much.

Cheers, linuxcbon

It seems that the userspace app is trying to free a memory block twice. Only
the author of the application can help to fix this.

This may eventually be caused by some driver bad behavior or OOPS. Do you have
any oops message, if you run "dmesg" ?

About skype, their V4L support is still broken, at least on the versions I
tested here. I have several webcams here. On my tests, it worked only with one
specific model. I suspect that they support only a very few subset of the
supported video formats.

Cheers,
Mauro
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Relevant Pages

  • Re: Limits to what can be done without source
    ... new version with their bug fixed. ... Well, OK, there is another vendor that ships binaries. ... at the device driver level on either features or reliability. ... done so for the functionality it claims to support. ...
    (Fedora)
  • Re: System Error (1003) - 0x000000CB
    ... I shall disabled the auto-reboot after bug check and see what, ... This indicates that a driver or the I/O manager failed ... A call to Microsoft Support seems appropriate. ... one of our Terminal Servers randomly reboot itself without ...
    (microsoft.public.windows.terminal_services)
  • Re: Intel usb camera on FC6
    ... >>> I guess it doesn't support the camera after all, ... Smack in the middle is the 0733:0401 Intel CS330 webcam entry and it ... shows it as working with the spca50x driver. ... Rick Stevens, ...
    (Fedora)
  • RE : Re: Question about Creative Webcam Pro PD1030 ? Bug ?
    ... I am not sure if this is a bug, ... registered new interface driver ov511 ... About skype, their V4L support is still broken, at least on the versions ... I got no oops message from kernel. ...
    (Linux-Kernel)
  • Re: uvcvideo module compatibility
    ... I presume the reason is that the driver is built into that kernel and so ... the webcam becomes plug-and-play. ... programs don't support V4L2, and sometimes a device driver only supports V4L ... Some programs work better than others with particular ...
    (comp.os.linux.hardware)