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List:       freedesktop-xorg
Subject:    Nvidia: Xorg displaying 50 Hz but uses 60 Hz
From:       Paul Menzel <paulepanter () users ! sourceforge ! net>
Date:       2010-08-26 19:26:11
Message-ID: 1282850771.4082.9.camel () mattotaupa
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Dear X.org folks,


there seems to be a bug where the wrong refresh rate is displayed to the
one which is used [1][2].

Despite setting

    VertRefresh    50.0

60 Hz is used when not setting an explicit modeline.

Am Donnerstag, den 26.08.2010, 16:16 +0200 schrieb Thomas Hilber:
> On Thu, Aug 26, 2010 at 03:06:51PM +0100, Tony Houghton wrote:
> > Are you aware of the interaction between DynamicTwinView and XRandR? The
> 
> no. But if Xorg.0.log tells me (in the bad case):
> 
> (II) NVIDIA(0):   Validating Mode "1920x1080":
> (II) NVIDIA(0):     1920 x 1080 @ 50 Hz
> (II) NVIDIA(0):     For use as DFP backend.
> (II) NVIDIA(0):     Mode Source: EDID
> (II) NVIDIA(0):       Pixel Clock      : 148.50 MHz
> (II) NVIDIA(0):       HRes, HSyncStart : 1920, 2448
> (II) NVIDIA(0):       HSyncEnd, HTotal : 2492, 2640
> (II) NVIDIA(0):       VRes, VSyncStart : 1080, 1084
> (II) NVIDIA(0):       VSyncEnd, VTotal : 1089, 1125
> (II) NVIDIA(0):       H/V Polarity     : +/+
> (II) NVIDIA(0):     Mode is valid.
> [...]
> (II) NVIDIA(0): "1920x1080_50"       : 1920 x 1080 @  50.0 Hz  (from: EDID)
> [...]
> (II) NVIDIA(0):     Config Options in the README.
> (II) NVIDIA(0): Setting mode "1920x1080_50"
> 
> and it uses a 60Hz modeline though this is clearly a Xserver bug for me.

Is that a bug in the X server or of the Nvidia proprietary driver?


Thanks,

Paul


[1] http://linuxtv.org/pipermail/vdr/2010-August/023448.html
[2] http://linuxtv.org/pipermail/vdr/2010-August/023455.html

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