[Bug 41418] New: [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[Bug 41418] New: [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

           Summary: [RV350] Screen corruption with certain resolutions on
                    LVDS (scaled)
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: dev@karlchenofhell.org


I'm getting a screen corruption with the resolutions
  1400x1050
  1440x900
on a RV350, using kernel-3.0.4, libdrm-2.4.26.

A photograph of the corrupted screen under X is attached, though the corruption
also appears using tests/modetest w/o X started.

--------
# lspci -nns1:0.0
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M10 NT [FireGL
Mobility T2] [1002:4e54] (rev 80)
--------

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

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https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #1 from Franz Brauße <dev@karlchenofhell.org> 2011-10-03 07:42:20 PDT ---
Created an attachment (id=51894)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=51894)
Corrupted screen

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #2 from Franz Brauße <dev@karlchenofhell.org> 2011-10-03 07:45:55 PDT ---
Created an attachment (id=51895)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=51895)
dmesg output of a modetest run with 1400x1050 resolution and drm.debug=15

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

Franz Brauße <dev@karlchenofhell.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #51895|application/octet-stream    |text/plain
          mime type|                            |

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #3 from Franz Brauße <dev@karlchenofhell.org> 2011-10-03 08:36:17 PDT ---
The issue is also present in the latest git kernel from today, 3.1.0-rc8+,
commit 9b13776977d45505469edc6decc93e9e3799afe2

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #4 from Franz Brauße <dev@karlchenofhell.org> 2011-10-03 08:42:26 PDT ---
Created an attachment (id=51898)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=51898)
complete dmesg for 3.1.0-rc8+

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> 2011-10-04 06:43:32 PDT ---
Can you attach the output of xrandr --verbose?  Note that Full aspect scaling
is not implemented for pre-avivo asics, so make sure you are not using that. 
Center and Full do work however.

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41418

--- Comment #6 from Franz Brauße <dev@karlchenofhell.org> 2011-10-05 11:40:51 PDT ---
Created an attachment (id=52020)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=52020)
xrandr --verbose with several 'scaling mode' properties

Appearently the scaling mode property was set to "Full" by default.

There is no difference in the visible image between "Full" and "Full aspect"
scaling mode, "Center" does enable the backlight but the screen stays black,
"None" shows the FB at coords (0,0) and a cloned portion of it below separated
by a black horizontal bar as the native display resolution of 1600x1200 is used
(so I'd say that one works).

I've attached xrandr --verbose outputs for "Full", "None" and the non-working
"Center" scaling modes using 1400x1050 resolution.
If those outputs for 1440x900 would help, too, I'll upload them as well.

Thank you for taking a look at this issue.

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[Bug 41418] [RV350] Screen corruption with certain resolutions on LVDS (scaled)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=41418

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #7 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/215.

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