Re: [gentoo-user] New machine: Contents of display are offset around 2 inches from the left hand side.

[Michael <confabulate@kintzios.com>]

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On Sunday, 25 August 2024 14:53:21 BST Dale wrote:
> Alan Mackenzie wrote:

> > This is read-edid version 3.0.2. Prepare for some fun.
> > Attempting to use i2c interface
> > No EDID on bus 0
> > No EDID on bus 2
> > No EDID on bus 3
> > No EDID on bus 4
> > No EDID on bus 5
> > No EDID on bus 6
> > No EDID on bus 7
> > 1 potential busses found: 1
> > 256-byte EDID successfully retrieved from i2c bus 1
> > Looks like i2c was successful. Have a good day.
> > Checksum Correct
> > 
> > Section "Monitor"
> > 
> >         Identifier "SMB2430L"
> >         ModelName "SMB2430L"
> >         VendorName "SAM"
> >         # Monitor Manufactured week 13 of 2011
> >         # EDID version 1.3
> >         # Digital Display
> >         DisplaySize 520 290
> >         Gamma 2.20
> >         Option "DPMS" "true"
> >         Horizsync 30-81
> >         VertRefresh 56-75
> >         # Maximum pixel clock is 170MHz
> >         #Not giving standard mode: 1280x800, 60Hz
> >         #Not giving standard mode: 1280x960, 60Hz
> >         #Not giving standard mode: 1280x1024, 60Hz
> >         #Not giving standard mode: 1440x900, 60Hz
> >         #Not giving standard mode: 1600x1200, 60Hz
> >         #Not giving standard mode: 1680x1050, 60Hz
> >         #Not giving standard mode: 1152x864, 75Hz
> >         #Not giving standard mode: 1440x900, 75Hz
> >         
> >         #Extension block found. Parsing...
> >         Modeline        "Mode 0" +hsync +vsync
> >         Modeline        "Mode 1" +hsync +vsync
> >         Modeline        "Mode 2" +hsync +vsync
> >         Modeline        "Mode 3" +hsync +vsync
> >         Modeline        "Mode 4" -hsync -vsync
> > 
> > EndSection

[Snip ...]
> Just for giggles, I emerged that package and ran that command on my
> system.  All my monitors are running at 1920 x 1080.  However, this is
> my output. 
> 
> 
> root@Gentoo-1 / # get-edid | parse-edid
> This is read-edid version 3.0.2. Prepare for some fun.
> Attempting to use i2c interface
> No EDID on bus 0
> No EDID on bus 1
> No EDID on bus 2
> No EDID on bus 4
> No EDID on bus 5
> 2 potential busses found: 3 6
> Will scan through until the first EDID is found.
> Pass a bus number as an option to this program to go only for that one.
> 256-byte EDID successfully retrieved from i2c bus 3
> Looks like i2c was successful. Have a good day.
> Checksum Correct
> 
> Section "Monitor"
>         Identifier "LS32B30"
>         ModelName "LS32B30"
>         VendorName "SAM"
>         # Monitor Manufactured week 13 of 2024
>         # EDID version 1.3
>         # Digital Display
>         DisplaySize 160 90
>         Gamma 2.20
>         Option "DPMS" "true"
>         Horizsync 30-84
>         VertRefresh 48-75
>         # Maximum pixel clock is 180MHz
>         #Not giving standard mode: 1280x720, 60Hz
>         #Not giving standard mode: 1280x800, 60Hz
>         #Not giving standard mode: 1280x1024, 60Hz
>         #Not giving standard mode: 1440x900, 60Hz
>         #Not giving standard mode: 1600x900, 60Hz
>         #Not giving standard mode: 1680x1050, 60Hz
>         #Not giving standard mode: 1152x864, 75Hz
> 
>         #Extension block found. Parsing...
>         Modeline        "Mode 7" +hsync +vsync
>         Modeline        "Mode 0" +hsync +vsync
>         Modeline        "Mode 1" 148.500 1920 2008 2052 2200 1080 1084
> 1089 1125 +hsync +vsync
>         Modeline        "Mode 2" 74.250 1280 1390 1420 1650 720 725 730
> 750 +hsync +vsync
>         Modeline        "Mode 3" 148.500 1920 2448 2492 2640 1080 1084
> 1089 1125 +hsync +vsync
>         Modeline        "Mode 4" 74.250 1280 1720 1760 1980 720 725 730
> 750 +hsync +vsync
>         Modeline        "Mode 5" 27.027 720 736 798 858 480 489 495 525
> -hsync -vsync
>         Modeline        "Mode 6" 27.000 720 732 796 864 576 581 586 625
> -hsync -vsync
>         Modeline        "Mode 8" -hsync -vsync
>         Modeline        "Mode 9" -hsync -vsync
>         Modeline        "Mode 10" +hsync +vsync
>         Option "PreferredMode" "Mode 7"
> EndSection
> root@Gentoo-1 / #
> 
> 
> Even tho my monitor is working fine, no winking in a while now, the
> resolution it is running at isn't listed either.

The resolution is listed - look at Mode 1 and Mode 3.  It is also providing a 
preferred Mode.


> I might also add, I
> have three monitors connected but only one is seen by that command. 

Check the line above stating "Will scan through until the first EDID is 
found."  For additional monitor EDID's you'll probably have to specify a 
different I2C bus number.


> I'm wondering if there is something wonky with that program.  I'd expect
> the resolution it is currently running at to be listed.  Given it is
> not, I'd call that odd.  Or wonky.  ;-)  I might add, there is some
> differences so it is seeing something.  It's not just spitting out the
> same info no matter what. 
> 
> Odd. 
> 
> Dale
> 
> :-)  :-) 

I recall you were using an adaptor for (some of?) your monitor cables.  
Adaptors can cause Modelines to not be detected at all or not detected fully.  
I should count myself lucky because I have not come across such problems at 
least since using VGA cables with CRT monitors.  ;-)

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