On 14/02/13 21:54, Paul Swartz wrote:
I am attempting to use coot0.7 installed using the yum archive on Fedora 18 and
a computer with intel HD graphics 4000 driver. When coot starts initially, the
rotation and translation is nearly at the speed that I am used to with Fedora
16 install. If I do not translate, the rotation speed remains good. If I do
translate, the rotation speed drops off by about 50 %.
We are talking about merely translating the view here (not the molecule)
right?
At drops off more after each translation and eventually is so slow that it is
unusable. I do not think that it is a graphics issue as pymol does not have
any speed problems even with surfaces exhibited. Does anyone have a suggestion
as to what I am doing wrong in the coot install? Thank you very much for any
help you can give me.
Sounds like a graphics driver bug to me.
If I had to guess, I'd suggest that pymol uses display objects and (for
the most part) coot does not (it uses immediate mode).
We did hear before about problems of Sandy Bridge with Fedora 18, IIRC
(and thus I tried to install Fed 18 on my laptop (to "share the pain")
but the installer crashed in a heap at partition-time - I gave up).
I'd be curious to know if the problem still occurs with either Nahalem
or Ivy Bridge.
Not much help - sorry.
Paul.
