[Nouveau] [Bug 33977] New: X core font rendering is "laggy"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33977

           Summary: X core font rendering is "laggy"
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: abrasive at axdf.net
         QAContact: xorg-team at lists.x.org


I'm having trouble with terminals under X after updating xf86-video-nouveau and
libdrm.
When entering characters (in urxvt), the cursor in the previous cell is only
cleared after some delay, and lines printed in the terminal are often not
displayed until I generate more output or update some other part of the screen.
 There are also remnants of text visible in the fractional row under the last
terminal row. This seems to be an issue only with X core fonts, and not with
Xft ones.

I have an NV50 card, and the issue appeared after updating xf86-video-nouveau
from a git snapshot on 2010-08-19 to one from 2010-12-17. The issue is still
present on 2011-02-06. The upgrade necessitated upgrading libdrm from 2.4.21 to
2.4.23.

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