Red Hat Bugzilla – Bug 860228
Rendering / performance issues with polymol on GeForce 310 (GT218 / NVA8)
Last modified: 2014-02-05 07:18:52 EST
Description of problem:
During today's test day, 3D performance seemed to generally work well except with pymol. No problems in any of the other 3D test cases.
Version-Release number of selected component (if applicable):
xorg-x11-drv-nouveau-1.0.1-6.fc18.x86_64 (i.e. what's included in http://adamwill.fedorapeople.org/graphics_test_week_20120924/20120924-test_days-x86_64.iso)
Steps to Reproduce:
Rather slow rendering (might be normal, though - have no reference right now) and flickering (the image seems to be dislocated for like 1/10s every 1-2 seconds). Only the 3D rendered stuff is affected - the window/menu/etc. is not.
Smolt Profile: http://www.smolts.org/client/show/pub_a62cdaf6-9160-4e06-9595-19cd83f4b0d0
Created attachment 616960 [details]
Output of glxinfo
Created attachment 616961 [details]
Observed a similar behaviour on a notebook with a GT 220M.
Pymol viewer window had a top black "margin" of 1 cm (window contents appear downward displaced), and a flickering was present. Flicker period was approx. 1 s. Flicker duration is less than 1/4 of a second. On each blink, top margin disappeared and window contents seemed to be correctly top aligned.
Slow rendering. Rendering update was apparently coincident with flickering.
Tested PyMOL behaviour on my desktop system (F17, same PyMOL version, Core 2 Duo, ATI HD4890), and all these problems were not present (no slowness, no flicker, no displaced window contents).
By the way, except for the offset and blinks, viewer window contents seemd to be OK (no rendering artifacts)
Tested same PyMOL once more with Nouveau TestDay LiveCD on another system (4 years old) and results were somehow "similar". I don't know if this is a problem with PyMOL, but this same PyMOL version in my F17 desktop system apparently works perfectly.
It seemed that when PyMOL was redrawing the viewer window contents, the top black margin appeared for 0.5 - 1 s and window contents were displaced. These happened not only while visualizing 3D contents in the demo (it happens in all the visualization demos), but even in the "splash" contents of the viewer just after having launched PyMOL from cmdline, if I created mouse events (just a click, for example), which probably caused redraws of the viewer window.
Once more, rendering was slow (more or less, 1 FPS on a GeForce GO 7300 + T5500). On one of the runnings, just after using Wizard -> Demo, the black margin was not empty, but 2 horizontal bars appeared on top, with a width of approximately 250 px: one completely empty (top) and the second one filled to 75% (no clue what they are). These 2 bars moved the rest of the contents so that the lower PyMOL> prompt as well as the play, stop etc. buttons (and something more of the lower right info text box) are hidden.
Just as a note, using Nouveau testday LiveCD on a system with radeon driver (HD4890) does not show my "flickering" or the top margin problems [however I belive rendering is not problem free either].
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