Sergey wrote:Morn76 wrote:If the whole computer freezes, it's probably an issue with the graphics card or driver. I use AMD Catalyst, which seems pretty stable, but e.g. the Intel driver seems to give some people problems. So maybe try a different driver if there is one for your card?
Then why does it happen after hours of playing? Not right after starting MT?
Memory consumption?
I can only talk about KDE and Catalyst here, but the crashes/freezes I've seen are sometimes related to switching to/from fullscreen (think playing a YouTube video in the browser), sites that use WebGL (like Google Maps in 3-D mode), or just desktop compositing in general (which KDE uses for its pretty effects). It looks like either the graphics hardware or the driver occasionally gets into a bad state from which it cannot recover. The rest of the system is fine, e.g. audio from a browser tab keeps playing.
So it doesn't have to be MT alone in your case; it might be a combination of something that e.g. your browser or desktop environment do with 3-D acceleration at the same time. E.g., with the open source Radeon driver, I would get all kind of weird screen artifacts in KDE when I ran Google Maps and MC side by side.
So I think disabling WebGL in browsers and running a simple desktop or window manager without OpenGL compositing might help if a different driver is not possible.