Labs/Bespin/KnownIssues: Difference between revisions

Labs/Bespin/KnownIssues (view source)

687 bytes added , 18 February 2009

Rewritten this section according to http://groups.google.com/group/bespin/browse_thread/thread/26b757d00c94cf77

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 ==== Why does it seem slow on Linux? ====
-We have had a few people complaining about the performance on Linux. It seems like people worked it out, and that it was an nvidia driver issue.
+People using Firefox3 on Linux with an Nvidia card are facing important performance issues on canvas rendering that makes Bespin unusable (see [https://bugzilla.mozilla.org/show_bug.cgi?id=439881 related Bug]).
-Some changed over to the "NV" drivers and all worked, but you can't run with compviz and co.
+This is due to the fact that, under firefox 3, canvas uses xlib/xrender for its rendering instead of pure software rendering under firefox 2. Unfortunately, the state of xrender in Nvidia binary driver is [http://www.larsen-b.com/Article/299.html still] [http://www.larsen-b.com/Article/290.html far from perfection].
+The currents solutions are either to use the "NV" drivers (but it won't be possible to benefit of the same level of 3D acceleration used by compiz and co)  or to tweak the InitialPixmapPlacement as follows:
+ nvidia-settings -a InitialPixmapPlacement=2
+To make this tweak permanent, add a new entry in your session configuration. For example in Ubuntu: System > preferences > sessions > add ...
 ==== Why does it seem slow on Chrome? ====