Question: Setting display dimensions

[Jukka A. Ukkonen]

On 2019-09-24 11:52, Michael Schuster wrote:
> 
> I think it'd help if you let us know whether you're talking 
> about console mode or X-Window ...
> (and no, I have no idea off hand what to do in either case ... but 
> perhaps someone who does will be more willing to jump in when more 
> information is provided)

Oops... My bad. I really should have mentioned that I was thinking
of the VT console.

> On Tue, Sep 24, 2019 at 10:45 AM Jukka Ukkonen <jau789 at gmail.com 
> <mailto:jau789 at gmail.com>> wrote:
> 
> 
>     Hello all,
> 
>     Recently I bought a small HDMI connected 1024x600 pixels TFT
>     display. It seems that 11-stable does not find the correct dimensions
>     automatically. The kernel apparently assumes the display to be far
>     larger than it actually is and a lot of text simply disappears below
>     the lower edge of the screen. So, I assumed there might be some
>     method to tell the kernel the default dimensions to use when it fails
>     to confirm the actual values from the display device itself.
> 
>     Now I would like to check whether I am interpreting things correctly.
>     Apparently there is kernel MIB variable for this purpose on 12.x series
>     (kern.vt.fb.default_mode) but not on 11.x. If this is true, I would
>     like to
>     understand why is the feature not available on 11-stable as well?
>     Have I understood the meaning of the default_mode variable correctly
>     for 12.x and will it work properly for a 1024x600 display?
> 
>     Moving over to 12-stable will not be a big issue on a new system, if
>     that is necessary, but I would like to avoid taking the effort of
>     upgrade
>     unless I can be relatively sure it will solve my problem.
> 
>     --jau