Lucid PPA hosed me! How do I revert?

wally bkg wb666greene at
Tue Mar 15 07:47:31 PDT 2011

Fortunately I found an answer on the Ubuntu forums.

Install: ppa-purge package

in a terminal with a long scrollback buffer (so you can manually reinstall
what fails to reinstall automatically after the purge)

sudo ppa-purge ppa_gstreamer-developers/ppa

This should be documented on the gstreamer-developers PPA homepave, but if
it is I sure couldn't find it!
IMHO the uninstall instructions need to be at least as prominent as the
installation instructions.

My advice is to think twice and carefully before installing from a PPA!

After "upgrading" using the Lucid PPA (
> my gstreamer is totally hosed!
> The most fundamental stating point for my application no longer works at
> all:
> gst-launch v4l2src ! video/x-raw-yuv, framerate=\(fraction\)30000/1001,
> width=640, height=480 ! xvimagesink
> Setting pipeline to PAUSED ...
> ERROR: Pipeline doesn't want to pause.
> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device
> '/dev/video0' cannot capture at 640x480
> Additional debug info:
> gstv4l2object.c(2093): gst_v4l2_object_set_format ():
> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
> Call to S_FMT failed for YUYV @ 640x480: Invalid argument
> Setting pipeline to NULL ...
> Freeing pipeline ...
> How do I revert to the stuff in the repos that at least mostly worked?
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