Re: Genuis Emessenger 310 webcam slow work with pac7302 in 2.6.37.1 kernel

Re: Genuis Emessenger 310 webcam slow work with pac7302 in 2.6.37.1 kernel

[housegregory299]

В Вск, 27/02/2011 в 05:26 +0600, housegregory299 пишет:
> Hello! Thanks for answer to me.
> Outputs from these commands: 
> 
> root@debian:/home/t800# cat /proc/version
> Linux version 2.6.37-1-amd64 (Debian 2.6.37-1) (ben@decadent.org.uk)
> (gcc version 4.4.5 (Debian 4.4.5-10) ) #1 SMP Tue Feb 15 17:43:38 UTC
> 2011
> 
> dpkg -l libv4l-0 :
> ii  libv4l-0       0.8.0-1        Collection of video4linux support
> libraries
> 
> root@debian:/home/t800# dpkg -l |grep linux-image
> ii  linux-image-2.6-amd64                 2.6.32+29
> Linux 2.6 for 64-bit PCs (meta-package)
> ii  linux-image-2.6.32-5-amd64            2.6.32-30
> Linux 2.6.32 for 64-bit PCs
> ii  linux-image-2.6.37-1-amd64            2.6.37-1
> Linux 2.6.37 for 64-bit PCs
> 
> dmesg output: No Errors 
> [    5.497771] gspca: v2.10.0 registered
> [    5.575635] gspca: probing 093a:2624
> [    5.579935] input: pac7302
> as /devices/pci0000:00/0000:00:1d.3/usb5/5-2/input/input6
> [    5.580056] gspca: video0 created
> [    5.580084] usbcore: registered new interface driver pac7302
> [    5.658209] usbcore: registered new interface driver snd-usb-audio
> 
> Frame rate not depend on the content of image, but in 2.6.32 kernel is
> depend on Exposure, i set up the webcam through the program  guvcview,
> (in 2.6.32) and lowered Exposure value to 0% and freezes disappeared,
> and will be OK. But the colors were a bit distorted and blurred.
> In the 2.6.37.1 (Installed from Sid Repository) colors are better on
> image, but I can not lower the value Exposure to reduce freezes, but
> increase this value is impossible without freezes or slow frame rate. 
> 
> Therefore, I usually lower them parameter to configure. Earlier this
> helps. But not with the new kernel. I also tried ubuntu 10.10 with
> 2.6.35.xx stock kernel and freezes there be similar.
> Webcam's image normally visible in Cheese, skype and Kopete.
> Thank you for tips, 
> I'll definitely try them.  It is a pity that it happened, in the new
> kernel has many improvements to my PC
> 
> My PC's quick specs:
> Gigabyte G31M-ES2L Motherboard
> CPU: Intel Dualcore 2.93 GHz 
> 4 GB Ram 
> Realtek HD alc883 audio integrated
> GPU: ATI Radeon HD 4650 (1024 mb) GDDR2 PC-e x16 by Gigabyte
> 
> In Debian/Ubuntu distros all devices work fine - without any problem
> except webcam. 
> 
> Translating partially done by Google Translator and 
> 
> I'll understand a little English =) 
> 
>  

Re: Genuis Emessenger 310 webcam slow work with pac7302 in 2.6.37.1 kernel

[housegregory299]

В Вск, 27/02/2011 в 18:37 +0600, housegregory299 пишет:
> > As I understand the webcam was not working properly even using 2.6.32
> > kernel.
> 
> Yes, this is so. But in near installed Windows 7 webcam also work slow
> and picture quality is worse  than on Debian with 2.6.37. I think my
> webcam very limited functionality. I have to keep both the kernels on my
> system - 2.6.32 and 2.6.37 and switch between them on the need.  
> 
> > Are you using v4l2ucp for setting exposure value? This command is
> > available
> > from the v4l2ucp Debian package. Are the other controls working
> > properly?
> 
> I use v4l2ucp from command line to saving and loading webcam's
> customised parameters, (v4l2ucp -s .webcam and v4l2ucp -l .webcam)
> but with other keys are not used. All parameters in Guvcview work fine
> and properly, except Exposure. 
> 
> > Some more hints for the trying the "test images": make sure that
> > v4l-utils
> > Debian package is installed ("apt-get install v4l-utils" as root).
> > Then
> > you can use the command "v4l2-dbg --set-register=0x72 x" where "x" is
> > any
> > number between 0 and 15. This command has to be executed as root. To
> > return
> > to the normal operation just use the zero value for x. I'm not sure
> > that
> > these test patterns will work for your webcam model also, but it would
> > be
> > interesting to try.
> 
> command "v4l2-dbg --set-register=0x72 10 not help to me: With value 0
> output are similar:
> 
> root@debian:/home/t800# v4l2-dbg --set-register=0x72 10
> Failed to set register 0x00000072 value 0xa: Invalid argument
> 
> But i try setup my webcam with v4l-utils.
> 
> > The main problem is that the manufacturer of the chip which is
> > included
> > in your webcam neither released programming documentation nor
> > implemented
> > a standard protocol like USB Video Class. Without documentation open
> > source
> > projects can only use trial and error
> > ( http://en.wikipedia.org/wiki/Trial_and_error ).
> 
> I understand, OK. So.. Which webcam is better suited for Linux systems -
> UVC standard ? This is open? or closed? Sorry, if this question is wrong
> - i don't know which webcam select for my Linux-system.
> 
> > I would strongly recommend to add the mailing list
> > "linux-media@vger.kernel.org"
> > in CC field, so more people can see this conversation. 
> 
> OK. I do it 

Re: Genuis Emessenger 310 webcam slow work with pac7302 in 2.6.37.1 kernel

[housegregory299]

В Сбт, 26/02/2011 в 17:11 +0600, housegregory299 пишет:
> Hello! My name is Galym, I'm from Kazakhstan. Sorry for my bad English.
> My Genuis E-messenger 310 webcam slow work with pac7302 in 2.6.37.1
> kernel. 
> I lowered the Exposure value ((to reduce freezes) since my webcam is
> running slow, (ie, slow picture) but the picture freezes completely. I
> had to return the value. (In the previous kernel 2.6.32 everything was
> OK, because there used pac7311).
> 
> My device ID: 
> Bus 005 Device 002: ID 093a:2624 Pixart Imaging, Inc. Webcam
> 
> My system: Debian Squeeze Stable 64-bit with 2.6.37.1 kernel (kernel
> installed from Sid Repository) 
> 
> I hope for your help.