Nouveau - Apr 2009 - [Bug 21124] New: nouveau: fonts "chipped" on NV44

http://bugs.freedesktop.org/show_bug.cgi?id=21124

           Summary: nouveau: fonts "chipped" on NV44
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: marti at juffo.org
         QAContact: xorg-team at lists.x.org


Created an attachment (id=24711)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=24711)
Screenshot of the artifacts

I'm seeing chipped letters (see screenshot) when using the nouveau driver
with
my Nvidia GeForce 6200; some of the rightmost pixels of letters are sometimes
made transparent. Screenshot: http://www.juffo.org/junk/nouveau-fonts.png

No relevant errors/warnings found in Xorg.0.log

Most, but not all programs exhibit this behavior. Exceptions that I have
observed include the URXVT and xterm terminal emulators, and also window
titlebars (using xfwm4). All fonts look normal with NVIDIA's proprietary
drivers.

Using xf86-video-nouveau from git revision
d8545e669aaa4362a236ba2e7231ca27ffdea1bd and libdrm revision
fef29358bb407f35b90e8c6ee913e4979786cfd5; compiled using packages from the
nouveau Portage overlay.

lspci reports this:
01:00.0 VGA compatible controller: nVidia Corporation NV44 [GeForce 6200
TurboCache(TM)] (rev a1) (prog-if 00 [VGA controller])

This is on a native AMD64 Gentoo system (no insane CFLAGS). Versions:
vanilla-sources-2.6.28.7
xorg-server-1.5.3-r5
cairo-1.8.6-r1
pango-1.22.4
gtk+-2.12.12


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--- Comment #1 from Younes Manton <younes.m at gmail.com>  2009-04-11
09:56:46 PST ---
Strange, I have a non-TC NV44 and all my fonts look fine. I'm assuming you
had
no problems previously and a recent update caused this, or is this the first
time you've tried Nouveau?

Does your kernel log have any errors?


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--- Comment #2 from Maarten Maathuis <madman2003 at gmail.com>  2009-04-11
10:09:15 PST ---
I'd like to point out that gentoo ships a heavily patches version of
xorg-server, 41 patches that affect exa. It's possible a mistake was made in
the backporting somewhere. I'm not saying it is the issue, just consider it
when searching for the answer.


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--- Comment #3 from Marti <marti at juffo.org>  2009-04-11 23:40:44 PST
---
(In reply to comment #1)
> or is this the first time you've tried Nouveau?
Yes.
> Does your kernel log have any errors?
None.


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--- Comment #4 from Younes Manton <younes.m at gmail.com>  2009-04-12
07:05:33 PST ---
Maybe you can build the server from the git overlay to see if it's a Gentoo
patch causing it? If it's not an issue with Gentoo's xserver it might be
an
issue with TurboCache variants in the driver.


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--- Comment #5 from Francesco Marella <francesco.marella at gmail.com> 
2009-05-03 02:33:50 PST ---
Just to let you know that I saw chipped letters too when using the nouveau
driver with my Nvidia GeForce Go 7300 and using:

Ubuntu 9.04 (jaunty)
kernel 2.6.28
xserver-xorg-core (2:1.6.0-0ubuntu14)
xserver-xorg-video-nouveau (1:0.0.10~git+20090404+11be9a9-0ubuntu1)
nouveau-kernel-source (0.0.11+git20090404-0ubuntu1)
libdrm-nouveau1 (2.4.5-0ubuntu4)


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--- Comment #6 from Patrick <mail at patrick-nagel.net>  2009-07-08
20:26:12 PST ---
Created an attachment (id=27508)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=27508)
Changes with different sub-pixel rendering and hinting style settings

I have the exact same problem on Fedora 11 (just upgraded from Fedora 10).

Hardware:
01:00.0 VGA compatible controller: nVidia Corporation GeForce 7100 GS (rev a1)

Fedora's version string:
0.0.12-40.20090528git0c17b87.fc11

It changed when I played around with KDE's "sub-pixel rendering"
and "hinting
style" settings, see for yourself in the attached PNG.


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Philippe Gauthier <philippe.gauthier at deuxpi.ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |philippe.gauthier at deuxpi.ca

--- Comment #7 from Philippe Gauthier <philippe.gauthier at deuxpi.ca>
2010-06-04 12:35:04 PDT ---
I can't see the problem anymore if I am using the latest Git packages from
Ubuntu's "xorg-edgers" packages. These package have the following
X server
version code:

xorg-server
2:1.8.1.901+git20100602+server-1.8-branch.b65c5be1-0ubuntu0sarvatt4~lucid

Current video hardware:

01:00.0 VGA compatible controller: nVidia Corporation G72 [GeForce 7300 SE/7200
GS] (rev a1)

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--- Comment #8 from Vlado Plaga <rechner at vlado-do.de> 2010-08-17
05:48:12 PDT ---
(In reply to comment #6)
> It changed when I played around with KDE's "sub-pixel
rendering" and "hinting
> style" settings, see for yourself in the attached PNG.
Thank you very much, Patrick! I now had similar problems with damaged fonts
(most often in letters like "l", "i", or symbols like
":" and "." for about
half a year!

Changing the sub-pixel rendering settings in KDE (System Settings/ Application
Appearance/ fonts/) made fonts on my system look great again! I had to chose
"deactivated" (looks ugly) or "activated" instead of the
preset "system
default".

The problems often only occurred after I had started a few applications and
used them for some time. I tried different operating systems (Fedora, Debian,
Ubuntu) with different versions of nouveau. With the "nv" driver I
newer had
such problems. I'm so glad this seems fixed for me now!

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

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

--- Comment #9 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

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