Unfortunately, a recent update has caused issues for some users using Compiz as their window manager. After updating, you may discover a missing pointer or large X cursor.
Bug report concerning the issue:
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1544814
Package Version
Affected: 1:0.9.12.2+15.10.
20151202
-0ubuntu1
Previous: 1:0.9.12.2+15.10.
20151015
-0ubuntu1
Unaffected:
- Some Compiz users may have no issues
- Marco
- Compton
What should you do?
If you do not use Compiz or kept the default settings, you do not need to do anything.
If you haven’t updated, uncheck any updates for Compiz to avoid trouble.
If you have updated and are now experiencing cursor problems, the workaround is to switch to Marco via MATE Tweak or downgrade Compiz.
Downgrading Compiz is as simple as pasting this command into the terminal:
sudo apt-get install compiz=1:0.9.12.2+15.10.20151015-0ubuntu1 \
compiz-core=1:0.9.12.2+15.10.20151015-0ubuntu1 \
compiz-gnome=1:0.9.12.2+15.10.20151015-0ubuntu1 \
compiz-plugins-default=1:0.9.12.2+15.10.20151015-0ubuntu1 \
libcompizconfig0=1:0.9.12.2+15.10.20151015-0ubuntu1 \
libdecoration0=1:0.9.12.2+15.10.20151015-0ubuntu1
Sorry for the inconvenience.
New bugs caused by updates can happen, but are generally rare.