Your X is falling back to VESA driver instead of using intel driver provided by xf86-video-intel. I'm wondering why?!
Do you have nomodeset at your kernel cmdline? If so, please remove.
If this isn't the case, please paste me output of:
lspci -nn | grep VGA
and also output of dmesg with kernel booted with drm.debug=0xe cmdline parameter.
Thanks,
Rodrigo.
i followed a topic to get hardware acceleration working on my Intel graphics card
http://www.webupd8.org/2013/09/adobe-flash-player-hardware.htm
i guess problem started after executed this line:
after reboot i find the system can't load driver normally, here is some output i got:
root@derek-Aspire-4741:/etc/apt/sources.list.d# vainfo
libva info: VA-API version 0.34.0
libva info: va_getDriverName() returns -1
libva error: va_getDriverName() failed with unknown libva error,driver_name=(null)
vaInitialize failed with error code -1 (unknown libva error),exit
log file:[ 323.023]