Switching to Xorg fixed the problem, but I had a very slow page scrolling in documents reading, in firefox or windows resizing, and turned back to Xvesa.
Definitely a big performance difference between Xvesa and Xorg on slower hardware. Should you retry Xorg a custom xorg.conf file may help, specifying 16-bit color depth, in regards to scrolling and window manager performance. Modify the 'Screen' section in xorg.conf to something like:
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1152x864"
EndSubSection
EndSection
Lighter FLTK-based flburn is also available as a Brasero alternative.