[pvrusb2] pvrusb2 and suspend.

[xavier.gnata@free.fr]

Quoting roger <roger at eskimo.com>:

> Although the driver, as module, can be easily put into
> "/etc/hibernate/blacklisted-modules" for automated unloading during
> suspend (and automated loading once returning from suspend),  I'm
> curious what would happen the driver is streaming on /dev/v4l/video0 and
> the machine is placed into suspend.

Sure it can be but if you look at other in kernel v4l, as far as I can see, they
implement these suspend/resume function.
It is often not so difficult to stop the streaming and to reset the device at
resume time.  "/etc/hibernate/blacklisted-modules" is a blacklist :). It exists
only because drivers which are not suspend/resume compliant exist.
Mike has done a very nice job to avoid kernel oops when you unplug the device
during streaming. IMHO, it would be great not to have to add pvrusb2 in the
module blacklisted list (wich is know quite short)

Trol : Even with ati non free driver, suspend to ram works well ;)

Xavier

> On Wed, 2006-08-02 at 21:11 +0200, xavier.gnata at free.fr wrote:
>
> > Hi,
> >
> > pvrusb2 works vey well on my machine.
> > suspend to ram works also perfectly (I'm lucky) but it fails is pvrusb2 is
> > loaded.
> > I get a kernel oops in ehci each time.
>
>
> Isn't this then a bug with ehci?
>
> If I'm not mistaken, I could suspend here with pvrusb2 loaded.  But I've
> never tried suspending with the driver actively streaming
> on /dev/v4l/video.
>
>
>
> >
> > Looking at the code, I'm seeing we have no .suspend and .resume here so it
> has
> > no chance to work.
> > For sure, adding this support into pvrusb2 may notbe enough because pvrusb2
> > loads several other modules.
>
>
> The kernel with suspend2 patches should suspend just fine with the other
> needed kernel modules built statically into the kernel
> (bttv,msp,saa7113),...), and I believe these drivers will suspend both.
> as module as well as statically.
>
>
> I can see one area where suspend is nice with pvrusb2, to keep lircd
> running as well as mythtv on return from suspend.  (As getting lirc
> working is usually tricky sometimes.)
>
>
> Anyways, have you posted this "ehci kernel oops" with usb-ehci?
>
>
> >
> > Mike : I'm sure you know what to do in .suspend and .resume ;)
> >
> > Xavier
> > _______________________________________________
> > pvrusb2 mailing list
> > pvrusb2 at isely.net
> > http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
>
> --
> Roger
> http://www.eskimo.com/~roger/index.html
> Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61
>
> Thu Aug 3 08:57:33 PDT 2006
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