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Cannot display this video mode

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  Cannot display this video mode M Bernard Richards <maxwell.richards@gmail.com> - 2020-05-04 12:10 +0200
    Re: Cannot display this video mode Dan Ritter <dsr@randomstring.org> - 2020-05-04 13:50 +0200
      Re: Cannot display this video mode M Bernard Richards <maxwell.richards@gmail.com> - 2020-05-11 21:00 +0200
    Re: Cannot display this video mode deloptes <deloptes@gmail.com> - 2020-05-05 08:50 +0200

#222222 — Cannot display this video mode

Hi,

I tried to upgrade from Debian 9.12.. (for which the Dell monitor worked 
well) to buster and got the above message. Also it says "Optimum 
resolution 1280 x 1024". I tried the howtoforge.com advice but without 
success.

Any advice for an ordinary user, appreciated.

Thanks,

M Bernard Richards.


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#222224

M Bernard Richards wrote: 
> Hi,
> 
> I tried to upgrade from Debian 9.12.. (for which the Dell monitor worked
> well) to buster and got the above message. Also it says "Optimum resolution
> 1280 x 1024". I tried the howtoforge.com advice but without success.

At what point did this occur? What had you just done?

Does the machine boot at all?

-dsr-

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#222385

On 04/05/2020 20:50, Dan Ritter wrote:
> M Bernard Richards wrote:
>> On 04/05/2020 12:43, Dan Ritter wrote:
>>> M Bernard Richards wrote:
>>>> Hi,
>>>>
>>>> I tried to upgrade from Debian 9.12.. (for which the Dell monitor worked
>>>> well) to buster and got the above message. Also it says "Optimum resolution
>>>> 1280 x 1024". I tried the howtoforge.com advice but without success.
>>> At what point did this occur? What had you just done?
>>>
>>> Does the machine boot at all?
>>>
>>> -dsr-
>> Hello and thanks for your message.
> Custom is for people to keep talking on-list, so that searching
> can bring up problems and answers in the future.
>
>> I had used a step-by-step?? guide from nixCraft, the final step being to run
>> (as root) apt-full-upgrade to go from Debian 9.12 to Debian 10 Buster
>>
>> I then did a reboot to verify that all was OK, and the above message came up
>> along with "Optimum Resolution 1280 x 1024 60 Hz".
>>
>> The machine worked fine with this monitor for several weeks prior to this,
>> using Debian 9.12.
>>
>> Yes the machine boots and allows me to do Ctrl-Alt-F1 etc. and login as user
>> and as root
>
> That's good. The most likely issue is that the X server is
> ignoring your monitor's capabilities (via EDID) and has just
> picked a common resolution ... which is wrong for you.
>
> You can fix this by adding some configuration:
>
> Section "Screen"
>          Identifier "Screen0"
>          Device     "Card0"
>          Monitor    "Monitor0"
>          SubSection "Display"
>                  Modes "1280x1024
>                  Depth     24
>          EndSubSection
> EndSection
>
> The question is where to put this. /usr/share/X11/xorg.conf.d/
> is a likely location. If the Identifier, Device or Monitor
> strings are incorrect, you can find them in /var/log/Xorg.0.log
> or in ~/.local/share/xorg/Xorg.0.log
>
> -dsr-

Thanks for the suggestions. Tried that, made a file called xorg.conf 
using the above suggestion and put it with the other config files in 
/use/share/X11/xorg.conf.d/ to no avail.

mbnr

Stilll no luck


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#222246

M Bernard Richards wrote:

> I tried to upgrade from Debian 9.12.. (for which the Dell monitor worked
> well) to buster and got the above message. Also it says "Optimum
> resolution 1280 x 1024". I tried the howtoforge.com advice but without
> success.

did you try moveing away xorg.conf?

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