: /dev/video0: No such device
That's pretty normal, the driver doesn't support the read() interface. Try
using applications such as luvcview, ucview or ekiga, they should work fine.
Best regards,
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On Thursday 06 December 2007, Philipp Kolmann wrote:
Hi Laurent,
thanks for looking into this issue.
On Wed, Dec 05, 2007 at 11:31:58PM +0100, Laurent Pinchart wrote:
Hi Philipp,
On Tuesday 04 December 2007, Philipp Kolmann wrote:
Hi,
I have a Logitech QuickCam 9000 which works
light. It drops in
framerate from 25fps to 7fps, as the light level drops.
untested on USB1
Its performance at low light is perhaps a little better than other
cameras of the same sort.
Thanks for the report. I updated the supported devices list on the website.
Best regards,
Laurent Pinchart
-fi.org/Logitech_QuickCam_Pro_9000
So thank you everybody very much for all these programs for uvcvideo
based webcams.
Thanks a lot for your contribution. Documentation is always appreciated.
You could also announce this on the www.quickcamteam.net forum.
Best regards,
Laurent Pinchart
Hi Martin,
On Sunday 09 December 2007, Martin Ebourne wrote:
When I run ekiga, open the configuration druid and then cancel it, most
times ekiga locks up.
I'm using r5776 and the backtrace is below.
This should go to the Ekiga support mailing list/forum.
Best regards,
Laurent Pinchart
Hi Lars,
On Friday 07 December 2007 11:12, Lars Schimmer wrote:
Laurent Pinchart wrote:
- Skype could stop streaming, change the frame rate and restart
streaming. Ditto about the webcam crash.
It would be interesting to write a small application to stress-test
different use cases
, the
values could even be raised. Raising UVC_MAX_ISO_PACKETS will introduce a
bigger latency in the video stream but might put less pressure on the USB
controller than raising UVC_URBS (I'm not 100% sure about this).
Best regards,
Laurent Pinchart
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to find out who is to blame. I don't have enough knowledge of the ehci driver
to understand its scheduling policy.
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the isoc pipe?
The UVC spec allows devices to use either bulk or isochronous transfers. Most
webcams went for isoc. Bulk-based UVC devices are not common.
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impossible for you for some reason ?
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check the kernel
log for error messages and report them here.
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but misses to erase
Module.symvers. Instead the clean Makefile rule says Modules.symvers
(note the additional s).
Thanks. Committed.
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Laurent Pinchart
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,
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counter.
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the fact that auto gain is not supported by the device, you haven't
missed anything obvious.
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is obviously
impossible with most webcams.
here some other informations for you:
motion, linux-uvc svn
archlinux with kernel 2.6.23
usb 2.0 pci card
lsusb: Bus 004 Device 002: ID 046d:08ce Logitech, Inc. QuickCam Pro 5000
Best regards,
Laurent Pinchart
Hi Lawrence,
On Wednesday 19 December 2007, Lawrence Leonard wrote:
Thanks to Laurent Pinchart, I now know that the OmniVision 2641 device
should work out of the box, and after rebooting it did come up
automatically in Skype and Ekiga and I was able to get the microphone
adjustments set so
regards,
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) message
should disappear complete. If it doesn't, you're still using the unpatched
driver.
Best regards,
Laurent Pinchart
Index: uvc_video.c
===
--- uvc_video.c (revision 157)
+++ uvc_video.c (working copy)
@@ -821,8 +821,7 @@
/* Some
+ (qctrl2.maximum - qctrl2.minimum) / 2)
/ (qctrl2.maximum - qctrl2.minimum);
}
return 0;
}
When qctrl2.maximum equals qctrl2.minimum the code will divide by zero and
crash.
Best regards,
Laurent Pinchart
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-t debug none /sys/kernel/debug
cat /sys/kernel/debug/usbmon/busnrt usbmon.dump
You will need debugfs and usbmon support in your kernel.
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to are a quickdirty hack
to work around the problem. They help some users and are completely
ineffective for others. There is currently no known way to fix the problem.
It would require in-depth analysis with a hardware USB2.0 analyser.
Best regards,
Laurent Pinchart
);
[Format checks]
[More initialization]
[Camera control settings]
}
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by the UVC driver ?
That camera isn't UVC compatible so it will never be supported by the UVC
driver.
http://www.quickcamteam.net/hcl/linux/logitech-webcams
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resubmission.
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]
Thanks for the information. Unfortunately the camera isn't UVC compatible, so
you won't have luck with the UVC driver :-(
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? Please try to plug the camera in another port and see if it
helps.
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it is a 4063 rather than 4056 that it's a
slightly newer unit. It would be nice if Creative listed things like
that on the boxes.
Could you please run 'lsusb -d 041e:4063 -v' and send the output ? Make sure
you use usbutils 0.72 or newer.
Best regards,
Laurent Pinchart
)
Please use usbutils 0.72 or newer when generating lsusb dumps.
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list.
Also, the camera module is mounted upside-down, but that is a minor
problem.
I'll try to contact to Sonix developers again to find a solution but there's
not much I can do without their support.
Best regards,
Laurent Pinchart
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Hi Mark,
On Saturday 29 December 2007, mslemko wrote:
Laurent Pinchart wrote:
On Friday 28 December 2007, mslemko wrote:
Hi,
I have a Logitech Quickcam Orbit AF and the video is working nicely at 5
fps in all camera resolutions.
However, I get errors from the luvcview application
to video conference.
Ok, more on topic, here is the output of updated lsusb from DV mode:
[snip]
I've just committed a patch which should fix the issue you experienced with DV
mode.
Best regards,
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anyway.
Your webcam seems to be correctly detected and initialised by the driver. It's
now time to try and use it. I suggest luvcview, uvccapture or ucview for a
first try. Let me know if it works.
Best regards,
Laurent Pinchart
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Hi Claudio,
On Saturday 29 December 2007, Claudio Matsuoka wrote:
On Dec 28, 2007 9:26 PM, Laurent Pinchart [EMAIL PROTECTED]
wrote:
I have a pending patch that passes the uvc_video_device structure to URB
completion callbacks instead of the uvc_video_queue structure. This
should take
On Friday 04 January 2008, Antoine Cellerier wrote:
This patch fixes the auto exposure mode control so it complies with
4.2.2.1.2. of USB_Video_Class_1.1.pdf .
Thanks. Applied.
Best regards,
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any suggestions ?
I don't see any error. Running
luvcview -f yuv
should display the video stream.
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the webcam work with the Linux UVC driver ?
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be buggy ;-) I know that Skype tries to change the frame rate
while streaming. The driver currently allows that but doesn't handle the
request properly. It might make the webcam crash.
I plan to fix it, probably by disallowing frame rate changes while streaming.
Best regards,
Laurent Pinchart
On Friday 04 January 2008, Antoine Cellerier wrote:
This patch adds the Auto-Exposure Priority Control as defined in
4.2.2.1.3. in USB_Video_Class_1.1.pdf .
Thanks. Applied.
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choice
uvcvideo: Found UVC 1.00 device unnamed (046d:0992)
BUG: atomic counter underflow at:
[snip]
This should be fixed in the latest SVN revision. Could you please check ?
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Hi Jean-Christophe,
On Saturday 29 December 2007, Jean-Christophe Jice Cardot wrote:
Le vendredi 28 décembre 2007, Laurent Pinchart a écrit :
That doesn't look good. Do the 'USB disconnect' messages appear on their
own when you're not doing anything, or are they printed only when you try
use the
enumeration method described in
http://v4l2spec.bytesex.org/spec-single/v4l2.html#AEN794
Since I don't know the uvcvideo control code really well I haven't
started patching it yet and would like a confirmation from the gurus
that I'm reading the spec correctly.
Best regards,
Laurent
-list,
dev-streaming);
streaming is freed and the addition to the list skipped. So uvc_delete()
walks the list, but it won't find the entry. This looks like a memory leak
to me.
You're right. My bad. Thanks for the report. I committed a fix.
Best regards,
Laurent Pinchart
, with modifications to fix
the memory leak pointed out by Oliver and the status URB resubmission.
Thanks for your work.
Best regards,
Laurent Pinchart
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Hi,
On Friday 11 January 2008, Pierpaolo Vittorini wrote:
Alle giovedì 10 gennaio 2008, Laurent Pinchart ha scritto:
Hi Pierpaolo,
On Tuesday 08 January 2008, Pierpaolo Vittorini wrote:
Attached is the portion of lsusb -v output regarding my unsupported
chicony web cam, shipped
Hi Sab,
On Friday 11 January 2008, RUMI Szabolcs wrote:
Hi!
On Thu, 10 Jan 2008 21:34:13 +0100
Laurent Pinchart [EMAIL PROTECTED] wrote:
What makes this difference that it works while other apps don't?
Skype might be buggy ;-) I know that Skype tries to change the frame
rate while
in the uvc_ids array with
device-specific information set in the driver_info field.
Maybe a special svn trunk exists?
here is the svn command i used.
svn checkout svn://svn.berlios.de/linux-uvc/linux-uvc/trunk
Thanks in advance..
Best regards,
Laurent Pinchart
.
Best regards,
Laurent Pinchart
Index: uvc_video.c
===
--- uvc_video.c (revision 163)
+++ uvc_video.c (working copy)
@@ -722,7 +722,11 @@
if (ep == NULL)
return -EIO;
- ret = uvc_init_video_bulk(video, ep);
+ if ((ret
Hi Sean,
On Tuesday 15 January 2008, sean mathews wrote:
Sorry about that last post it was the wrong Device ID..
here is the corrected dump
lsusb -d eb1a:2750 -v
[snip]
You're right, it doesn't look like a UVC device. I'm afraid there's not much I
can do :-/
Best regards,
Laurent
compatible, it won't be supported by the UVC driver.
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., the frames would overlap etc. resulting in many display issues):
Your patch could drop the last payload of each frame. Could you please try the
attached patch ?
Best regards,
Laurent Pinchart
Index: uvc_video.c
===
--- uvc_video.c
(application kernel
logs).
On 14/01/2008, Philipp Kolmann [EMAIL PROTECTED] wrote:
Hi,
On Fri, Dec 07, 2007 at 01:37:46AM +0100, Laurent Pinchart wrote:
- The uvcvideo driver could stop streaming, renegotiate the parameters
and restart streaming. The webcam might still crash as the cause
, as syslog might need a small
delay to flush the messages to the log. If the driver returns -EIO to
luvcview there must be a corresponding message in the kernel log.
Cheers,
Laurent Pinchart
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On Tuesday 15 January 2008, Herton Ronaldo Krzesinski wrote:
Em Tuesday 15 January 2008 20:12:16 Laurent Pinchart escreveu:
On Tuesday 15 January 2008, Herton Ronaldo Krzesinski wrote:
Em Tuesday 15 January 2008 18:56:35 Laurent Pinchart escreveu:
Hi Herton,
On Tuesday 15 January
message
printed by the driver (using dmesg) and any application log message (I've
never used the application but I assume Skype prints messages to a log)
related to the problem.
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directly using UVC specific ioctls. I'm not
aware of any application doing this at the moment (test applications shipped
with libwebcam might but I haven't checked this).
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) Atr=01(Isoc) MxPS=2112 Ivl=125us
E: Ad=82(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
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is not UVC compatible, therefore it can't be
supported by the Linux UVC driver.
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for known webcams (except if you suspect your camera to have
different descriptors for the same VID:PID).
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/#footnote-2 for a
workaround.
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MJPEG compression frame
rates on USB 1.1 will be quite low.
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trying a new webcam) and give
it a try.
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? If so, please report them here.
Thanks for you job on this driver,
You're welcome. Thanks for the time you spent trying to improve it.
Best regards,
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linux?
Or any other idea to get that QC9000 working with webcam on Damn Small
Linux?
The UVC driver requires Linux kernel 2.6.15 or newer. It might be possible to
backport it to 2.4.x but that would require lots of work (and probably a
backport of the 2.6 USB stack).
Best regards,
Laurent
,
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for this webcam?
Thanks in advance.
This is the right driver. See my answer to Lawrence for an explanation of the
issue.
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. there.
What is wrong with Linphone?
I then tried the latest Linphone version on Windows Vista - with the
same result.
What's wrong?
Please check the kernel log (dmesg) after starting linphone and report
messages printed by the UVC driver.
Best regards,
Laurent Pinchart
the driver from
sources.
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(not
so strange).
Bus 001 Device 020: ID 04da:231a Panasonic (Matsushita)
lsusb output for dv-mode
[snip]
Most applications don't support DV data. You might have more success with
MPlayer which should be able to display the DV stream.
Best regards,
Laurent Pinchart
mjpeg2jpeg.py
message)
That might be a bug in the dynctrl branch. Please use sources from the trunk.
If you still get an oops I'll investigate and try to fix it.
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) is covered by the GPL. Don't forget to make the source
code available to people who will receive binaries :-)
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On Monday 04 February 2008, Michał Andrzej Woźniak wrote:
Dnia poniedziałek 04 luty 2008, Jesper Pedersen napisał(a):
Hi Laurent.
On Sun, 3 Feb 2008 20:10:14 +0100, Laurent Pinchart wrote
On Saturday 26 January 2008, Jesper Pedersen wrote:
Hi.
I have a Acer TravelMate 6592
Microelectronics Corp.
[snip]
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informations. i make a promise that as
soon as i get this webcam work well, I'll write a walkthrough for other
people that face the same problem.
I'll try to remember that :-)
Best regards,
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) or could it be a driver's bug? (I must admit I'm stuck
there...)
xawtv shouldn't crash, but it might be a problem in the driver. Could you
please try with SVN r179 (or newer) ?
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On Sunday 10 February 2008, Chris Rankin wrote:
--- Laurent Pinchart [EMAIL PROTECTED] wrote:
Could you check the kernel log (using the dmesg command) to see if the
driver reports errors when you get no picture in Ekiga ?
OK. No messages are reported other than:
usb 1-2: new high speed
(dmesg) after aMsn/Kopete/xaxtv failures to see if
the driver prints any error/warning message. If so, please report them on
the linux-uvc-devel mailing list.
Best regards,
Laurent Pinchart
Hi Laurent
For kopete I already reported the problem on the ml, for xawtv I've
isolated the crash
(or failure) here, so
that I can add the camera to the supported devices list.
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Hi Mike,
On Sunday 03 February 2008, Michał Andrzej Woźniak wrote:
Dnia niedziela 03 luty 2008, Laurent Pinchart napisał(a):
Hi Mike,
On Wednesday 30 January 2008, Michał Andrzej Woźniak wrote:
Hi guys
I am trying to get ALI 5606 to work (ID 0402:5606) on Kubuntu 7.10
(Gutsy
ID is 046d:0896 .
I tried to hack uvc_driver.c a bit to force it see the camera, but it
didn't create the corresponding /dev/video interface :-) .
The 046d:0896 isn't UVC compatible. It will never be supported by the Linux
UVC driver.
Best regards,
Laurent Pinchart
is not UVC compatible.
I am currently using the Philips pwc driver
(http://www.saillard.org/linux/pwc/), but it would be great to have a
UVC driver.
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Laurent Pinchart
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? Please
provide more details along with kernel log messages if available.
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Cheers,
Brandon
Thanks, done that. Nice to hear integration into mainline in prospect.
r180 should fix compilation on 2.6.25-r1. I'll revert it if the v4l2 patches
get merged into 2.6.25.
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Laurent Pinchart
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event notifications
Setting UVC_TRACE_FRAME fills the kernel log quite fast. UVC_TRACE_IOCTL and
UVC_TRACE_CALLS will also print a few messages per frame. Other traces output
less information.
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Laurent Pinchart
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startup.
/proc/sys/kernel/printk tweaking might help (just a wild guess, I don't use
Fedora).
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with USB 1.1).
Done. Thanks.
I'm going to copy here the full outputs of
'lsusb -v' both when the EHCI module was loaded, and when I used it with
OHCI. The latter may be interesting for you if you'd like to go into the
yuv-jpg format issue.
Best regards,
Laurent Pinchart
to
work.
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frames in the driver, I'll try to integrate it in the near future.
each cam access make a new line in dmesg:
uvcvideo: device USB Video Camera requested null bandwidth, defaulting
to lowest.
skype works.
Thanks for the report.
Best regards,
Laurent Pinchart
.
Martin Rubli will contact me directly if he needs any help, or will ask you
to come back to the list if needed.
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On Tuesday 12 February 2008, Sid Boyce wrote:
Laurent Pinchart wrote:
On Saturday 09 February 2008, Sid Boyce wrote:
With svn at revision 177, I can now get a picture when I do the skype
camera test, but it freezes after a few frames. Camera is built-in on
Acer Travelmate 7520 laptop
sent you help ?
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the problem.
Thanks for the patch. I've just applied it.
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or newer) ? I'll then add an entry for your device to the driver.
Best regards,
Laurent Pinchart
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Hi Brandon,
On Saturday 16 February 2008, Brandon Philips wrote:
As reported by Albert Chuang [EMAIL PROTECTED] a quirk is necessary
for this device.
I'm waiting for Albert to send me the USB device descriptors before committing
the patch.
Signed-off-by: Brandon Philips [EMAIL PROTECTED]
: x11
A window manager is available
video /dev/video0
/dev/video0 does not support read i/o
Your camera doesn't support MJPEG. You can select the YUV format with
luvcview -f yuv.
Best regards,
Laurent Pinchart
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Linux
the warnings. fd is used
uninitialised. You must open the device before using it. If the above sample
is an edited version of your code, check errno upon return of the ioctl call.
Best regards,
Laurent Pinchart
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