Spca5xx not working

[Mark Baas]

I had spca5xx working, but when i updated from (i think) 12 to 13. It stopped
working. I cannot get any trace. There is nothing in dmesg neither there is
in /var/log/syslog. Maybe i has to do with the external-drivers-usb-media_pwc:
Updated USB PWC driver (10.0.8). I saw in the changelog.

I hope you can fix...

Mark

[Stéphane Marguet (stemp)]

Same here

[Mark Baas (eljefe123)]

I see you fix the spca5xx driver. It works now, but as soon as i start a program
that makes use of the driver, gnomemeeting e.g. The system hangs (freezes).

[Julien Olivier (julo)]

I can confirm the freezing of the system when using my webcam.

[Ben Collins (ben-collins)]

Please see:

https://wiki.ubuntu.com/DebuggingSystemCrash

And try to get some more information regarding this crash, thanks.

[Stéphane Marguet (stemp)]

I'll like to help you, but I don't know any software or command using the
spca5xx driver without X.
My Webcam is working on Hoary, and was on Breezy Colony 3.

[Emmanuel Touzery (emmanuel-touzery)]

I don't know where to post this, #14566 or here, both bugs seem i identical. i
got the lockup too, 2.6.12-9-386.
I got a screenshot when running gnomemeeting on X and quickly switching to a
text console. I'll post it now.

[Emmanuel Touzery (emmanuel-touzery)]

Created an attachment (id=4166)
stacktrace of the lockup

[Emmanuel Touzery (emmanuel-touzery)]

btw, you surely know this, but i read on internet that that driver is
incompatible with gcc4 and must be built with gcc3.4.

[Ben Collins (ben-collins)]

(In reply to comment #6)
> I don't know where to post this, #14566 or here, both bugs seem i identical. i
> got the lockup too, 2.6.12-9-386.
> I got a screenshot when running gnomemeeting on X and quickly switching to a
> text console. I'll post it now.

Thanks for the trace. I wish I could see the couple of lines that got missed.
Any chance you could boot with a better resolution that has more lines on the
console? It's sort of important, because I need to know the exception type (NULL
deref, scheduling in IRQ, etc...).

Atleast I know where the problem is occuring.

Can you try one thing:

rmmod spca5xx
modprobe spca5xx compress=0

And retry the test? Maybe compression isn't as stable as it needs to be.

[Ben Collins (ben-collins)]

(In reply to comment #8)
> btw, you surely know this, but i read on internet that that driver is
> incompatible with gcc4 and must be built with gcc3.4.

All of our kernels and associated modules are compiled with gcc-3.4. Try: cat
/proc/version

[Emmanuel Touzery (emmanuel-touzery)]

I'll just add that in hoary i self-compiled that module (spca5xx-20050328) and
it was very stable with my webcam on the hoary kernel. before upgrading my
kernel i uninstalled it.
i'll try to get better resolution and the compression trick.

[Emmanuel Touzery (emmanuel-touzery)]

Created an attachment (id=4169)
complete stack trace

[Emmanuel Touzery (emmanuel-touzery)]

Created an attachment (id=4170)
it also crashes with no compression. i didn't check if the stacktrace is
different, i attach it too.

[Mark Baas (eljefe123)]

Yes i have the same kind of trace.
I have compiled with gcc-3.4 (export CC=gcc-3.4), but i think if you compile the module with
gcc-4.0, the system won't hang but the driver will simply not work and the will give the message
that it is compiled with the wrong gcc version.

[Emmanuel Touzery (emmanuel-touzery)]

someone on ubuntu-forums claims that he has a procedure producing a working
spca5xx driver on breezy:
http://ubuntuforums.org/showpost.php?p=383244&postcount=21

another person seems to confirm it works:
http://ubuntuforums.org/showthread.php?t=70657&page=4

i'll try it tonight at home (in 8 hours).

[Emmanuel Touzery (emmanuel-touzery)]

actually i won't have time to try the method posted on ubuntuforums as i
mentionned. but maybe take a look at it, as it seems to fix the problem for some
users.

[Mark Baas (eljefe123)]

Yes it works indeed. The only thing i skipped was the:
sudo rm -rf /lib/modules/`uname -r`/kernel/drivers/usb/media/spca5xx*

And after i did that and recompiled it, it worked.

[Mark Baas (eljefe123)]

no it does not work. I recompiled the driver and it worked. But now i
restarted my computer and i failed again.

[Emmanuel Touzery (emmanuel-touzery)]

(in my opinion) it's pretty clear by now that the driver shipped by ubuntu is
simply miscompiled. breezy release date is very soon now, that'd be quite
disappointing to ship a broken driver when a fix is known.

one more person confirmed recompiling fixed the problem:
http://ubuntuforums.org/showpost.php?p=388479&postcount=59

[Jim (lists-noetzel)]

(In reply to comment #19)
> (in my opinion) it's pretty clear by now that the driver shipped by ubuntu is
> simply miscompiled. breezy release date is very soon now, that'd be quite
> disappointing to ship a broken driver when a fix is known.
>
> one more person confirmed recompiling fixed the problem:
> http://ubuntuforums.org/showpost.php?p=388479&postcount=59

That's me - it was working, now it's not - bug is still valid

[Emmanuel Touzery (emmanuel-touzery)]

>> one more person confirmed recompiling fixed the problem:
>> http://ubuntuforums.org/showpost.php?p=388479&postcount=59
>
>That's me - it was working, now it's not - bug is still valid

isn't that possible that when upgrading with apt-get your valid spca5xx was
overwritten with the bad one from ubuntu?

[Jim (lists-noetzel)]

(In reply to comment #21)
> >> one more person confirmed recompiling fixed the problem:
> >> http://ubuntuforums.org/showpost.php?p=388479&postcount=59
> >
> >That's me - it was working, now it's not - bug is still valid
>
> isn't that possible that when upgrading with apt-get your valid spca5xx was
> overwritten with the bad one from ubuntu?

Quite possible - but I went back and re-installed spca5xx (even tried multiple
versions)

Still have the problem

[Juan José Rodríguez (juanjorm)]

(In reply to comment #22)
> (In reply to comment #21)
> > >> one more person confirmed recompiling fixed the problem:
> > >> http://ubuntuforums.org/showpost.php?p=388479&postcount=59
> > >
> > >That's me - it was working, now it's not - bug is still valid
> >
> > isn't that possible that when upgrading with apt-get your valid spca5xx was
> > overwritten with the bad one from ubuntu?
>
> Quite possible - but I went back and re-installed spca5xx (even tried multiple
> versions)
>
> Still have the problem

 After the compilation of the spca5xx driver, try:

sudo cp /lib/modules/`uname -r`/kernel/drivers/usb/media/spca5xx.ko
lib/modules/`uname -r`/kernel/drivers/usb/media/spca5xx/spca5xx.ko
sudo modprobe spca5xx GRed=217 GBlue=300 GGreen=224 gamma=4

Good luck!

(sorry: my english is very bad :-( )

Juanjo.

[pablovp (pablovp86)]

For me, recompiling the driver worked(using GCC 3.4) i followed the instructions
on this link:

http://ubuntuforums.org/showpost.php?p=383244&postcount=21

Thanks

Pablo Valério Polônia

[Julien Olivier (julo)]

This is fixed for me in Dapper.

[Ben Collins (ben-collins)]

Claimed fixed in dapper.

[Gen Zhang (genneth)]

Is there a workaround for people who want to stay with breezy? Dapper seems a
little too un-QA'ed to go to, especially if the machine is not being used by me.
For instance, has it been identified which kernel changes caused the unbreaking?

[Julien Olivier (julo)]

Sorry but I don't have a clue. All I know is that now it works with Dapper.

[Ben Collins (ben-collins)]

(In reply to comment #27)
> Is there a workaround for people who want to stay with breezy? Dapper seems a
> little too un-QA'ed to go to, especially if the machine is not being used by me.
> For instance, has it been identified which kernel changes caused the unbreaking?

Sorry. Only security fixes are going into breezy.

[Gen Zhang (genneth)]

Any chance of going into breezy backports?

[Trent Lloyd (lathiat)]

This driver does not work for me in dapper, Logitech QuickCam IM
i get the following:

[4303139.966000] drivers/usb/media/spca5xx/spca5xx-main.c: spca5xx driver 00.57.08 registered
[4303353.632000] drivers/usb/media/spca5xx/spca5xx-main.c: init isoc: usb_submit_urb(0) ret -28
[4303353.840000] ohci_hcd 0000:00:02.0: leak ed c233e200 (#81) state 2

iirc this did work in breezy for me