Rob Taheij

Just wanted to say that I'm also having this problem.
I have a Mobility HD 5800 series.
Yes I'm working on a laptop (student).

I'm working on a Windows 7 machine with a dual monitor setup.
Currently running Houdini version 13.0.198.21, but I also had this problem with older versions of Houdini.

I have tried the latest catalyst drivers (13.11), but with no success.
Also downgraded the drivers to an older version, again no success.
(now running the latest catalyst driver again).
Also played with the 3D viewport pref (GL 3.3 and GL 2.1), but so far the problem keeps coming.

The unreadable texts starts being an issue when my project finishes cooking. At this point there is a chance that it kicks in.
Very annoying bug.