Re: toshiba video problem
On Sun, 03 Apr 2022 19:50:01 +0200, Felix Miata
<mrmazda@earthlink.net> wrote:
>Noah Sombrero composed on 2022-04-03 08:40 (UTC-0400):
>
>> Thanks. I did find suggestions like this online. But it appears that
>> xorg.conf is no longer used, and is indeed missing from xorg.conf.d.
>> So I can simply create a new file with these entries and put it in
>> place?
>
>/etc/X11/xorg.con* are optional. They are available for use if and when automagic
>is not working. Before going through the manual configuration routine, let's first
>see what is actually happening. Please provide output from the following:
>
> cat /var/log/Xorg.0.log | pastebinit
>
>>>Section "Monitor"
>>> Identifier "Monitor-HDMI1"
>>> VendorName "LGD"
>>> ModelName "ULTRAWIDE"
>>> Modeline "2560x1080" 185.580 2560 2624 2688 2784 1080 1083 1093 1111 -HSync -VSync
>>> Option "PreferredMode" "2560x1080"
>>>EndSection
>
>GTF and CVT can be used to generate a modeline, but their results will be no
>better than the modeline X will generate automatically if given the proper data to
>substitute for EDID failure.
>
>>>Via xrandr instead, applying such a thing would look like this:
>
>>>xrandr --newmode "2560x1080" 185.580 2560 2624 2688 2784 1080 1083 1093 1111 -HSync -VSync
>>>xrandr --addmode HDMI1 "2560x1080"
>>>xrandr --output HDMI1 --mode "2560x1080"
>
>>>So that's the how. The what is best explained by this web page:
>>>https://arachnoid.com/modelines/
>
>>>Which should be enough for you to work out the specific timings
>>>needed to get this screen to work.
>
>Xorg is fully competent to generate needed modelines, given the right information.
>Normally that information comes from EDID. If EDID is broken, or not reaching
>Xorg, substitute information can provided via /etc/X11/xorg.con*.
>
> hwinfo --monitor
Bash says, hwinfo: command not found.
>should generate lines similar to these:
>
> Vert. Sync Range: 24-75 Hz
> Hor. Sync Range: 26-81 kHz
>
>These can be used in a config file, e.g. /etc/X11/xorg.conf.d/50-monitor.conf,
>containing:
>
> Section "Monitor"
> Identifier "DefaultMonitor"
> VendorName "MyBrand"
> ModelName "MyModel"
> HorizSync 26-81
> VertRefresh 24-75
> Option "PreferredMode" "1920x1080"
> EndSection
>
>This, appropriately adjusted to include the numbers for the specific display, is
>all the information Xorg usually needs to emulate the EDID information that
>apparently doesn't get processed correctly for whatever reason. Others may suggest
>a modeline is needed, but independent modeline generators rarely do any better
>calculating than Xorg does automatically, if & when given the needed data as above
>suggested. I've been using HorizSync and VertRefresh with difficult environments
>for well over a decade, and never have needed a pre-configured modeline. When
>configured with HorizSync and VertRefresh, instead of with a modeline, very likely
>plugging in a different display at some future time won't result in unusable
>output that inhibits removing or editing the .conf file containing the modeline.
--
Noah Sombrero
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