Re: vt(4) chops off the leftmost three columns

From: Adrian Chadd <adrian.chadd_at_gmail.com>
Date: Sat, 14 Jan 2017 18:52:06 -0800
hi,

no, the vt_vga backend doesn't yet do VESA.

I keep meaning to sit down and fix this, but life and wifi gets in the way.


-adrian


On 14 January 2017 at 16:27, Kevin Oberman <rkoberman_at_gmail.com> wrote:
> On Sat, Jan 14, 2017 at 2:11 PM, Adrian Chadd <adrian.chadd_at_gmail.com>
> wrote:
>>
>> It depends(tm). I think the VT code just does "640x480x4bpp" and lets
>> the BIOS sort it out. A lot of things don't cope well with 640x480
>> these days - they try autodetecting picture edges, but a black border
>> makes that very difficult.
>>
>>
>> -adrian
>
>
> Can you use vidcontrol(1) to change to something better? 1600x900, maybe?
> (Note, I have not tried this and I know that vt does not support a lot of
> vidcontrol functionality, but starting X sets the display to 200x56
> characters on my laptop.)
> --
> Kevin Oberman, Part time kid herder and retired Network Engineer
> E-mail: rkoberman_at_gmail.com
> PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683
>
>
>>
>> On 14 January 2017 at 08:57, Matthias Andree <matthias.andree_at_gmx.de>
>> wrote:
>> > Am 14.01.2017 um 00:11 schrieb Alan Somers:
>> >> I take it back.  The first three columns _are_ rendered, but they
>> >> don't show up on some monitiors.  It's as if those monitors require a
>> >> minimum amount of overscan on the left side of the screen, and vt(4)
>> >> doesn't provide enough.  Can that be tuned?
>> >
>> > Once upon a time, I've seen similar things on Linux, but with fewer
>> > pixels offset, when switching framebuffer drivers - back then, the
>> > scanning-VGA-timing was an issue. Is there any way to tweak the row and
>> > column timings, with blank periods, viewport offsets and thereabouts?
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Received on Sun Jan 15 2017 - 01:52:13 UTC

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