On Thu, Nov 3, 2011 at 8:00 AM, Doron Cohen <doronc@xxxxxxxxxxxx> wrote: > Hi, > I am dealing with a problems with suspend/hibernate freeze during resume > when DVB API is used. I found a workaround for it here > <http://forum.xbmc.org/showthread.php?t=71490> which solve the problem > but this is not a solution only a workaround. > > Problem is that when using USB DVB tuner the tuner is turned off/on > during the suspend process, meaning that during the resume the USB > disconnect and probe methods are running. > The disconnect method is causing a call to dvb_unregister_frontend (or, > if changing the order to dvb_dmxdev_release) This call hangs on > wait_event until fepriv->dvbdev->users will free all users. > > This works fine when application is not playing the video, but if an > application receives TV (tested with VLC and Kaffeine but true to all) > Users will be free only when the application stops. It works if the > device is plugged out during video display (users will be released when > application closes the frontend and than the device will be free) but > during the resume process, user interface is not working and there is a > dead lock system must be hard power off and on. > > The workaround just causes the application to close force before the > suspend. > > Since I only have Siano devices at hand, I couldn't prove if the problem > is with our driver or in all USB receivers or only related to Siano > driver, but exploring the code it seems that everybody are working in > the same way. > > Can anyone approve that suspend and hibernate works fine when DVB is > being watched by an application? Doron, Power management is a known problem in dvb-core -- it doesn't work "properly" in *any* driver. :-( Patches welcome ;-) Regards, Michael Krufky -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
