Re: [gentoo-user] Widescreen resolution strangeness with nvidia

Re: [gentoo-user] Widescreen resolution strangeness with nvidia

[Hans-Werner Hilse]

Hi,

On Mon, 2 Oct 2006 07:25:15 -0700 Grant <emailgrant@gmail.com> wrote:

> The TV has a native resolution of 1366x768 as stated by the
> manufacturer.  If I specify that resolution in xorg.conf, it says it's
> an invalid resolution and uses 1360x768 instead.

Probably because that's the only mode built into the driver near your
desired mode.

Just put an appropriate modeline in your xorg.conf. Probably you can
google it. But 1366 is a bit strange, though. In most cases, the
horizontal size can be divided by 8, if not 16.

> This leaves a column of six unused pixels on the left side of the
> screen.  If I use the masked version of nvidia-driver, 1366x768 also
> fails, but it is replaced with 1280x768.  Strangely, the screen in
> then completely filled. If I back off to the stable driver and
> specify 1280x768, it is accepted and fills the entire screen.
> 
> Is an actual resolution of 1280x768 being stretched to fill 1366?  If
> so, why isn't 1360x768 stretched to 1366?

Probably internal logic of the monitor. You'd have to ask its
manufacturer reg. the "why". BTW, you didn't tell how the monitor is
connected. Analog VGA?

-hwh
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Widescreen resolution strangeness with nvidia

[Grant]

> > The TV has a native resolution of 1366x768 as stated by the
> > manufacturer.  If I specify that resolution in xorg.conf, it says it's
> > an invalid resolution and uses 1360x768 instead.
>
> Probably because that's the only mode built into the driver near your
> desired mode.
>
> Just put an appropriate modeline in your xorg.conf. Probably you can
> google it. But 1366 is a bit strange, though. In most cases, the
> horizontal size can be divided by 8, if not 16.

Ok, I'll play with modelines later today.

> > This leaves a column of six unused pixels on the left side of the
> > screen.  If I use the masked version of nvidia-driver, 1366x768 also
> > fails, but it is replaced with 1280x768.  Strangely, the screen in
> > then completely filled. If I back off to the stable driver and
> > specify 1280x768, it is accepted and fills the entire screen.
> >
> > Is an actual resolution of 1280x768 being stretched to fill 1366?  If
> > so, why isn't 1360x768 stretched to 1366?
>
> Probably internal logic of the monitor. You'd have to ask its
> manufacturer reg. the "why". BTW, you didn't tell how the monitor is
> connected. Analog VGA?

It's connected via DVI.  So, it must be a case of 1280x768 being
stretched to 1366x768 by the TV right?

- Grant
-- 
gentoo-user@gentoo.org mailing list

[gentoo-user] Re: Widescreen resolution strangeness with nvidia

[James]

Grant <emailgrant <at> gmail.com> writes:


> The TV has a native resolution of 1366x768 as stated by the
> manufacturer.  If I specify that resolution in xorg.conf, it says it's
> an invalid resolution and uses 1360x768 instead. 


This is common, at least for my 37" widescreen LCD/tv/monitor, too:

Here's some portions of my xorg.conf file:


Section "Monitor"
        Identifier "Monitor0"
        VendorName "VIZIO"
        ModelName "VIZIO L32"
        HorizSync 31-70
        VertRefresh 50-85

      DisplaySize 347 195     # display size in mm for DPI autoset
 # width = 1366pix / 100pix/in -> 13.66in * 25.4mm/in -> 347 mm
 # height = 768pix / 100pix/in -> 7.68 in * 25.4mm/in -> 195 mm

        Mode    "1366x768"      # vfreq 59.815Hz, hfreq 47.553kHz
                DotClock        85.500000
                HTimings        1366 1494 1624 1798
                VTimings        768 770 776 795
                Flags           "-HSync" "+VSync"
        EndMode
EndSection
Section "Device"
        Identifier  "Card0"
        #Driver      "nv"
        Driver      "nvidia"
        #Driver      "NVIDIA"
        #Driver      "vga"
        VendorName  "nVidia Corporation"
        BoardName   "NV11 [GeForce2 MX/MX 400]"
        BusID       "PCI:1:0:0"
EndSection


Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"

        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth     24

        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1366x768"
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
                Modes    "1366x768"
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     15
                Modes    "1366x768"
        EndSubSection


Note:

I'm still using the SVGA port, not the HDMI port
and I do experience a little bit of "cropping"
but the numver 1360 is more correct. Everything 
 my setup is pretty much standard.

The model number was indicates a 32" screen, but
in fact it is a 37" screen. I do not believe this
makes a whole lot of difference.  If/when you get
the HDMI interface working send me some email 
with any differences in the xorg.conf file you notice.


hth,

James




 This leaves a column
> of six unused pixels on the left side of the screen.  If I use the
> masked version of nvidia-driver, 1366x768 also fails, but it is
> replaced with 1280x768.  Strangely, the screen in then completely
> filled.  If I back off to the stable driver and specify 1280x768, it
> is accepted and fills the entire screen.
> 
> Is an actual resolution of 1280x768 being stretched to fill 1366?  If
> so, why isn't 1360x768 stretched to 1366?
> 
> - Grant




-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Re: Widescreen resolution strangeness with nvidia

[Grant]

> > The TV has a native resolution of 1366x768 as stated by the
> > manufacturer.  If I specify that resolution in xorg.conf, it says it's
> > an invalid resolution and uses 1360x768 instead.
>
>
> This is common, at least for my 37" widescreen LCD/tv/monitor, too:

I tried the following modeline with no luck:

Modeline "1366 x 768" 115.0 1366 1494 1624 1798 768 770 776 795

- Grant
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Re: Widescreen resolution strangeness with nvidia

[Grant]

> > The TV has a native resolution of 1366x768 as stated by the
> > manufacturer.  If I specify that resolution in xorg.conf, it says it's
> > an invalid resolution and uses 1360x768 instead.
>
>
> This is common, at least for my 37" widescreen LCD/tv/monitor, too:

I found this from Nvidia:

http://nvidia.custhelp.com/cgi-bin/nvidia.cfg/php/enduser/std_adp.php?p_faqid=143

which states:

"NVIDIA GPUs can now support horizontal timings that are not evenly
divisible by eight.  However, such resolutions (example H .1366 x V.
768) must be included within the Displays EDID* firmware."

How can I see my monitor's actual EDID information?

- Grant
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Re: Widescreen resolution strangeness with nvidia

[Hemmann, Volker Armin]

On Tuesday 03 October 2006 03:32, Grant wrote:
> > > The TV has a native resolution of 1366x768 as stated by the
> > > manufacturer.  If I specify that resolution in xorg.conf, it says it's
> > > an invalid resolution and uses 1360x768 instead.
> >
> > This is common, at least for my 37" widescreen LCD/tv/monitor, too:
>
> I found this from Nvidia:
>
> http://nvidia.custhelp.com/cgi-bin/nvidia.cfg/php/enduser/std_adp.php?p_faq
>id=143
>
> which states:
>
> "NVIDIA GPUs can now support horizontal timings that are not evenly
> divisible by eight.  However, such resolutions (example H .1366 x V.
> 768) must be included within the Displays EDID* firmware."
>
> How can I see my monitor's actual EDID information?
>

maybe ddcmon? it is part of the lm_sensors package
-- 
gentoo-user@gentoo.org mailing list

[gentoo-user] Re: Widescreen resolution strangeness with nvidia

[James]

Grant <emailgrant <at> gmail.com> writes:




> I found this from Nvidia:

http://nvidia.custhelp.com/cgi-bin/nvidia.cfg/php/enduser/std_adp.php?p_faqid=143

> which states:

> "NVIDIA GPUs can now support horizontal timings that are not evenly
> divisible by eight.  However, such resolutions (example H .1366 x V.
> 768) must be included within the Displays EDID* firmware."

> How can I see my monitor's actual EDID information?

dunno,

I'm no whiz at xorg.conf settings.

I was just sharing what works for me.....


sorry,

James






-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Re: Widescreen resolution strangeness with nvidia

[Alan McKinnon]

On Tuesday 03 October 2006 03:32, Grant wrote:

> How can I see my monitor's actual EDID information?


It's in /var/log/Xorg.0.log
View the file and look for the string edid, you'll find lots of info 
that the monitor reports up about itself

alan
-- 
gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Re: Widescreen resolution strangeness with nvidia

[Grant]

> > How can I see my monitor's actual EDID information?
>
>
> It's in /var/log/Xorg.0.log
> View the file and look for the string edid, you'll find lots of info
> that the monitor reports up about itself

I think it's up to the drivers to output EDID information to
Xorg.0.log.  When I had my old system (i810) hooked up to this screen,
it dumped a bunch of EDID info to the log, but my new system (nvidia)
doesn't divulge anything at all.

- Grant
-- 
gentoo-user@gentoo.org mailing list