Glyph rendering corruption

[Roman Polach]

While I have been using Linux Mint for years (and I am still using 17.0) without this problem,
now I installed 17.2 on new HW and I am experiencing strange visual corruption of rendered fonts.
I see these corruptions several times per day, mainly in Firefox and Gedit.
Some characters look like a garbage and after I selected the text (or I scroll it away and then
I scroll back), they get corrected - see the attachment (21 screenshot clip pairs).

I am also attaching output of lshw and lspci.
System has integrated Intel graphics, but the AMD graphics is the one I am using.

[Roman Polach (rpolach)]

Note: It seems to be different than https://bugs.launchpad.net/linuxmint/+bug/1261352
in 3 aspects:

* It is experienced on AMD, not Intel graphics
* Many times it looks like a scrum of other letters, while in 1261352 there are mostly isolated dots
* It is not dynamically changing when rendered once (see 1261352 attached video)

[Roman Polach (rpolach)]

more example screenshot clips...

[Roman Polach (rpolach)]

It is very often, that instead of right letter glyph, there is a mixture of another letters in various sizes...