История изменений

cat /var/log/Xorg.0.log | grep -ie uxa -ie sna
[     5.979] (II) intel(0): SNA initialized with Baytrail (gen7) backend

You might consider disabling sna acceleration in favor of uxa (uxa is slower, but more stable)... See: https://bugzilla.redhat.com/show_bug.cgi?id=1188772

You'd need to edit your /etc/X11/xorg.conf.d/20-intel.conf in line with comment #3 of that page...

You can always change it back if it's not it... Worth a shot...

Now that I know where to search information, I'm pretty sure the problem started when I enabled compiz.

But I'm trying with AccelMethod «glamor», and it looks pretty well. I hasn't crashed (yet), and it goes smoothly (not like «uxa»).

If it crashes, I'll go back again and continue from this point.

Thank you JaseP for your help

cat /var/log/Xorg.0.log | grep -ie uxa -ie sna
[     5.979] (II) intel(0): SNA initialized with Baytrail (gen7) backend

You might consider disabling sna acceleration in favor of uxa (uxa is slower, but more stable)... See: https://bugzilla.redhat.com/show_bug.cgi?id=1188772

You'd need to edit your /etc/X11/xorg.conf.d/20-intel.conf in line with comment #3 of that page...

You can always change it back if it's not it... Worth a shot...