2010-08-26 07:30:19

by Tino Keitel

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Subject: 2.6.36-rc2 regression: Wrong screen resolution (1024x768 instead of 1680x1050)

Hi,

booting 2.6.36-rc2-git4 (commit
d4348c678977c7093438bbbf2067c49396ae941b) results in a screen
resolution of 1024x768 instead of 1680x1050. It works fine with
2.6.35.2.

The framebuffer console uses the correct resolution, but only uses a
part of the screen for text output. Xorg output looks distorted.

Xorg log is attached.

$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
VGA1 disconnected (normal left inverted right x axis y axis)
DVI1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
454mm x 284mm
1680x1050 59.9 +
1280x1024 60.0
1280x960 60.0
1024x768 60.0*
800x600 60.3
640x480 60.0
720x400 70.1
TV1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
0mm x 0mm
848x480 30.0 +
640x480 30.0 +
1024x768 30.0*
800x600 30.0

This is a Mac mini Core 2 Duo with Intel i945 graphics.

Regards,
Tino


2010-08-26 07:55:34

by Tino Keitel

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Subject: Re: 2.6.36-rc2 regression: Wrong screen resolution (1024x768 instead of 1680x1050)

On Thu, Aug 26, 2010 at 09:30:39 +0200, Tino Keitel wrote:

[...]

> Xorg log is attached.

It wasn't. Not it is attached.

Regards,
Tino


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Xorg.0.log.gz (5.34 kB)
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2010-08-27 13:42:31

by Tino Keitel

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Subject: Re: 2.6.36-rc2 regression: Wrong screen resolution (1024x768 instead of 1680x1050)

On Thu, Aug 26, 2010 at 09:30:39 +0200, Tino Keitel wrote:
> Hi,
>
> booting 2.6.36-rc2-git4 (commit
> d4348c678977c7093438bbbf2067c49396ae941b) results in a screen
> resolution of 1024x768 instead of 1680x1050. It works fine with
> 2.6.35.2.
>
> The framebuffer console uses the correct resolution, but only uses a
> part of the screen for text output. Xorg output looks distorted.
>
> Xorg log is attached.
>
> $ xrandr
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
> VGA1 disconnected (normal left inverted right x axis y axis)
> DVI1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
> 454mm x 284mm
> 1680x1050 59.9 +
> 1280x1024 60.0
> 1280x960 60.0
> 1024x768 60.0*
> 800x600 60.3
> 640x480 60.0
> 720x400 70.1
> TV1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
> 0mm x 0mm
> 848x480 30.0 +
> 640x480 30.0 +
> 1024x768 30.0*
> 800x600 30.0

There is no TV connected, and it was correctly reported as
"disconnected" with 2.6.35.

The Mac mini has some special EDID handling, as the EDID data comes
from the analog EDID channel IIRC, if that helps.

Regards,
Tino

2010-08-29 13:19:27

by Maciej Rutecki

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Subject: Re: 2.6.36-rc2 regression: Wrong screen resolution (1024x768 instead of 1680x1050)

On czwartek, 26 sierpnia 2010 o 09:30:39 Tino Keitel wrote:
> Hi,
>
> booting 2.6.36-rc2-git4 (commit
> d4348c678977c7093438bbbf2067c49396ae941b) results in a screen
> resolution of 1024x768 instead of 1680x1050. It works fine with
> 2.6.35.2.
>
> The framebuffer console uses the correct resolution, but only uses a
> part of the screen for text output. Xorg output looks distorted.
>
> Xorg log is attached.
>
> $ xrandr
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
> VGA1 disconnected (normal left inverted right x axis y axis)
> DVI1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
> 454mm x 284mm
> 1680x1050 59.9 +
> 1280x1024 60.0
> 1280x960 60.0
> 1024x768 60.0*
> 800x600 60.3
> 640x480 60.0
> 720x400 70.1
> TV1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
> 0mm x 0mm
> 848x480 30.0 +
> 640x480 30.0 +
> 1024x768 30.0*
> 800x600 30.0
>
> This is a Mac mini Core 2 Duo with Intel i945 graphics.
>

Seems be similar to:
https://bugzilla.kernel.org/show_bug.cgi?id=17301

Regards
--
Maciej Rutecki
http://www.maciek.unixy.pl

2010-08-30 17:36:37

by Tino Keitel

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Subject: Re: 2.6.36-rc2 regression: Wrong screen resolution (1024x768 instead of 1680x1050)

On Sun, Aug 29, 2010 at 15:19:20 +0200, Maciej Rutecki wrote:
> > TV1 connected 1024x768+0+0 (normal left inverted right x axis y axis)
> > 0mm x 0mm
> > 848x480 30.0 +
> > 640x480 30.0 +
> > 1024x768 30.0*
> > 800x600 30.0
> >
> > This is a Mac mini Core 2 Duo with Intel i945 graphics.
> >
>
> Seems be similar to:
> https://bugzilla.kernel.org/show_bug.cgi?id=17301

Maybe. I don't know if this is connected, but after disabling TV out
using the attached patch, the screen has no signal after suspend to
RAM. However, the patch helped to get back the native LCD resolution
after boot.

Regards,
Tino


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