[arch-general] desktop crash after upgrade

[niya]

hi everyone

i have a intel atom netbook that i have arch installed on and have been 
using it for the last couple of years without any issues,
after doing a pacman -Syu recently when i reboot it gets through boot up 
to the point of setting up the desktop and then crashes with  2 thirds 
of the screen from left to right fill with a random rows of dots on a 
black background and the last third has my desktop with an exit icon at 
the bottom,
i went through the process of downgrading the kernel and got it to boot 
normally again
i thought that because it was a 32 bit computer the problem was to do 
with arch no longer supporting the i686 architecture
so i migrated the laptop to  Arch Linux 32, everything went smoothly , 
after the migration i rebooted the laptop  and i was back with the same 
problem.
i chrooted into the laptop with a live usb stick and retrieved a portion 
of the journal
here,s the log. error-report
<http://codepad.org/mtWYqv2N>
my Desktop Environment is lxde
if more of the logs are needed please let me know

i would be thankful for any pointers to fixing the problem

shadrock