strace -e open - this got the Camera working again

[Shlomi Fish]

On Sunday 01 March 2009 12:15:23 Moshe Brace using Yahoo wrote:
> I found that I could close the Control Panel and Root and Skype didn't
> crash on me. I have no idea if it will do it for a third time. :)
>

Maybe Skype forks. In any case, you can set up a root shell by firing up a 
terminal, and typing "su -" and then entering your root password.

> I have also tried the following regarding permissions
> I did
> [root at localhost ~]# cd /etc
> [root at localhost etc]# gedit /group

gedit "/group" will always edit the file "/group" on the /-directory (the 
system-wide root directory), which does not exist and does nothing. You 
probably meant "gedit group"

> This opened Gedit and I added the following:
> # Camera Group add Moshe
> # Moshe
> I also did the same to the file Gedit file "Group-"

You don't need to edit "group-". 

>
> In the Mandriva 2009.0 Gnome Console in Manage Users on System I selected
> the Users tab and edited my Login ticking all the Groups present. I then
> removed the tick on the Filter Users Tab.

All the groups? That may pose a security risk, because you may do things as 
your normal user that you should not normally do. I suggest you remove 
yourself from the groups that are not required to operate the camera.

>
> I tried previously with a backslash typed in before -o skype.strace skype
> and got the reply -o unknown command. 

A backslash *at the end of the line* tells the shell that the command 
continues on the next line. I included it in the command I gave you, because 
my client wrapped the line. But if it's only on one line, you don't need to 
include it. If you enter a backslash followed by a whitespace, then it would 
be a literal whitespace character (ASCII No. 32) that can be as part of a 
filename, etc.

> Then I typed as follows and Skype
> openend and the camera picture is good:
>
> [root at localhost ~]# LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so strace -f -e
> open -o skype.strace skype ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 ALSA lib pcm:2202: (snd_pcm_open_noupdate)
> Unknown PCM cards.pcm.hd1 Starting the process...
> Skype Xv: Xv ports available: 64
> Skype XShm: XShm support enabled
> Skype Xv: Using Xv port 325
> []

Can you please still send me the file "skype.strace" ? And you're still 
running it as root.

Regards,

	Shlomi Fish

-- 
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Shlomi Fish       http://www.shlomifish.org/
Why I Love Perl - http://xrl.us/bjn88

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