Nouveau - Feb 2009 - [Bug 20066] New: slowness in gnome-terminal

http://bugs.freedesktop.org/show_bug.cgi?id=20066

           Summary: slowness in gnome-terminal
           Product: xorg
           Version: 7.4
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: debian at oursours.net
         QAContact: xorg-team at lists.x.org


Nouveau is generally fast but not when it comes to gnome-terminal.

Things like opening a new tab, maximizing the window, restoring its size,
switching to a desktop with a gnome-terminal on it... take a couple of seconds.

The more the window is big, the more it's slow.

But it disappears when the gnome-terminal is minimized (reduced in the
taskbar). Switching desktops is then instantaneous.

The worst is when I maximize it vertically and then open a new tab. X seems
like frozen, thought I can still move the mouse but clicking has no effect.

It doesn't happen with xterm, so I guess gnome-terminal is using rendering
paths that are not accelerated in nouveau.

The card is a 8400M GS plugged to a 1280x800 LVDS, without any external screen.

As accidentally discovered with bug #20065, it doesn't happen in ShadowFB
NoAccel mode.

I'm quite puzzled about what information I could give you now. Or maybe the
bug
is know and this bug will remain open until it's fixed.

Regards


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http://bugs.freedesktop.org/show_bug.cgi?id=20066





--- Comment #1 from Maarten Maathuis <madman2003 at gmail.com>  2009-02-11
10:49:51 PST ---
For some reason gnome-terminal is trying to composite from the frontbuffer (use
it as a source). We (nouveau, nv50+) don't know how to tile the frontbuffer,
and the 3d engine cannot sample from a linear texture. So that causes a
fallback and a pretty ugly one it seems.


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Peter Hjalmarsson <xake at rymdraket.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xake at rymdraket.net




--- Comment #2 from Peter Hjalmarsson <xake at rymdraket.net>  2009-09-18
03:35:26 PST ---
How is this coming along?
Any more info or testing needed?


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Ben Skeggs <skeggsb at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




--- Comment #3 from Ben Skeggs <skeggsb at gmail.com>  2009-09-18 06:37:36
PST ---
This is fixed now.  Just be using a recent X server (1.7 or 1.7 pre-releases),
and git of all the nouveau bits and you'll be fine.


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