Comment 10 for bug 993187

Hi,

I also have these random freezes (Pangolin 64 bit on a Acer 5720 laptop with Nvidia Graphics and the restricted / Closed source Nvidia driver installed).

I have noticed though that it is 'only' the screenoutput that freezes/ comes to a halt. Yes, the mouse cursor still moves, but nothing else seems to happen. But as I was copying lots of files and my screen freezed I did not touch my system until I was confident that the copy process should be ready: in fact the control leds of my HD worked! and my Wifi indicator also worked (I was also downloading a file).

After a while (led of HD and Wifi returned to idle) I switched off my system and rebooted the system. The files were copied correctly and my download was saved properly in my downloads directory.

I have also noticed that starting any browser (Firefox / Chrome) will hang the system more quickly. I have also noticed that other 'screen-intensive' software like e.g. shotwell or any fotoviewer will cause the system to hang if used heavily.

This bug seems to be highly related to screen output and apparantly nothing else. As Pdparo reports this on AMD Radeon as well (and even without the closed source driver installed) it is most likely not a problem directly caused by those drivers.

I have noticed that my screens sometimes 'flashes' (on/off, but then very very fast) as it seems to refresh the screen.

If you google this subject you will find lots of posts in forums as well: this seems to be a huge issue!

I hope this information will help killing this nasty bug asap!