Nouveau - Apr 2008 - [Bug 15751] New: nouveau very slow with screen size > 2048

http://bugs.freedesktop.org/show_bug.cgi?id=15751

           Summary: nouveau very slow with screen size > 2048
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: sturnber at gmail.com
         QAContact: xorg-team at lists.x.org


I have two monitors side-by-side using the nouveau driver.  This setup
previously worked fine with the nvidia driver.  In xorg.conf if I set
"Virtual
2560 1024" in the Screen section the performance is horrible.  If I set the
width to anything greater than 2048 I have the same problem.  I can set the
screen size to 2048x2048 and awkwardly have the monitors on top of each other
and performance is fine.  It is unclear to me why 2048x2048 would have better
performance than 2560x1024 or even 2304x864.

http://bugs.freedesktop.org/show_bug.cgi?id=15751





--- Comment #1 from Maarten Maathuis <madman2003 at gmail.com>  2008-04-29
00:41:05 PST ---
The reason is quite simple, above 2048x2048 2d acceleration is completely
turned off. I don't know if this limit is the right one for NV17/NV18, being
a
mixed gf2/gf4 design.


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

http://bugs.freedesktop.org/show_bug.cgi?id=15751





--- Comment #2 from Maarten Maathuis <madman2003 at gmail.com>  2008-04-29
00:50:50 PST ---
Some more googling reveals it might be the correct limit. Even with this
limitation it's theoretically possible to use the monitors the way you want
(giving each crtc their own texture, which would work). There is a prototype
called shatter (which ofcource requires driver modifications), so there is hope
for the future.


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

http://bugs.freedesktop.org/show_bug.cgi?id=15751





--- Comment #3 from Scott Turnberg <sturnber at gmail.com>  2008-04-29
07:57:39 PST ---
Thanks for the quick reply.  I'll keep an eye out for the develpment of
shatter.


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

http://bugs.freedesktop.org/show_bug.cgi?id=15751


Gaetano Canepa <gaetano.canepa at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |21186




-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=15751

Ilia Mirkin <imirkin at alum.mit.edu> changed:

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

--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty
good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your
distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20130818/426eb6e0/attachment-0001.html>