Flash Plugin crashes in YouTube Fullscreen mode

[Bart Willemsen]

Hello,

I am having a very strange issue. It seems that the flash player always crashes when I try to watch a fullscreen video on YouTube. It always happens a few seconds after I am in full screen mode. The whole screen freezes and the only thing that I can do to fix this is to switch to another workspace (since I am still in fullscreen mode, I can't access the desktop in the current one) and kill the plugin-container process. When I just watch a video without switching to full screen, everything works just nice and without any issues.

Now I am not sure if this is entirely Firefox related, but it's the only browser where this happens. On Chrome/Chromium I don't witness this at least. I hope this is the right location to report it!

Information about my system:
Ubuntu version: 12.10 - 64 bit (but this also happened during 12.04!)
Firefox version: 16.0.2
Flash plugin version: 11.2.202.243

[Bart Willemsen (b-willemsen8)]

Right, small update: Seems to only happen with the 11.2 version of the Flash plugin. I don't have this problem on Google Chrome, with the latest 11.5 version of Flash.

 I also have this problem with different kinds of hardware. I wrote this report on my laptop, which has a AMD Mobility Radeon HD 4650 video card. But just recently I also installed Ubuntu on my desktop PC, which has an nVidia GeForce 9600 GT. So it doesn't seem to be related to a certain driver or something.

[Bart Willemsen (b-willemsen8)]

Also, why is it marked as "Incomplete" without giving some information about what else there might be needed?

[Thaddaeus Tintenfisch (thad-fisch-deactivatedaccount)]

Try disabling the plugin-container feature in Firefox.

http://kb.mozillazine.org/Plugin-container_and_out-of-process_plugins

[Bart Willemsen (b-willemsen8)]

That seems to fix it.. need to test it a bit more to confirm but I was able to watch a 10 minute YouTube video without the plugin crashing, which is already a major improvement. Thanks for the advice!

[Caffeine (luvlinux)]

I'm using ubuntu 12.04 on Thinkpad T430 and I got this bug frequently. I have to switch Youtube to use HTML5 T_T

[Chascon (chascone)]

Leaving nothing but the following lines in /etc/adobe/mms.cfg solved it for me.

EnableLinuxHWVideoDecode=0
OverrideGPUValidation=true

http://ubuntuforums.org/showthread.php?t=1985689