Since updating to Ubuntu 13.10, Shockwave Flash does not work in Chromium or Firefox. Both show a "Shockwave Flash has crashed" dialog.

Chromium 29.0.1547.65

After loading a page with a Flash video, I get this warning on the console twice:

NVIDIA: could not open the device file /dev/nvidia0 (Operation not permitted).

When I try to play the video, it crashes and I receive these disorted error messages:

(exe:14868): Gdk-WARNING **: XID collision, trouble ahead
[xcb] Extra reply data still left in queue
[xcb] This is most likely caused by a broken X extension library
[xcb] Aborting, sorry about that.
owser --type=plugin --plugin-path=/usr/lib/flashplugin-installer/libflashplayer.so --lang=de --channel=14560.18.20766867: ../../src/xcb_io.c:576: _XReply: Assertion `!xcb_xlib_extra_reply_data_left' failed.

Firefox 25.0

With Firefox, I get these errors:

###!!! ABORT: Request 154.24: BadValue (integer parameter out of range for operation); 3 requests ago: file /build/buildd/firefox-25.0+build3/toolkit/xre/nsX11ErrorHandler.cpp, line 157
WARNING: pipe error (110): Connection reset by peer: file /build/buildd/firefox-25.0+build3/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 437

###!!! [Parent][RPCChannel] Error: Channel error: cannot send/recv

What I tried so far

• Reinstalling flashplugin-installer
• Changing permissions of /dev/nvidia0

It seems that Flash Aid is no longer available. GPU acceleration is working fine, e.g. for Portal.

Does anyone know how to fix this?