(In reply to comment #2)
> The weight paint not showing was fixed by
> https://bugs.freedesktop.org/show_bug.cgi?id=81967 which will be included in
> the 10.3 mesa release (isn't quite out the door yet though).
> 
> Three questions: is it a 512MB or 1GB 5770, and how much system RAM do you
> have? Do you get any messages in dmesg while running blender?

Well, fix is there and sooner or later i could use it, thank you!

5770 is 1Gb and i have 12Gb of RAM. I'll answer on dmesg question as soon as
i'm home.