Re: Weird characters in virtual terminal consoles from (CTRL-ALT) F2 to F6 and over F7

[Helge Deller <deller@gmx.de>]

On 12/22/25 16:09, Camaleón wrote:
> El 2025-12-22 a las 11:59 +0100, Gianluca Renzi escribió:
> > On 12/22/25 11:13, Helge Deller wrote:
> > > On 12/22/25 11:09, Gianluca Renzi wrote:
> > > > Wow! So you found the culprit.
>
> My deepest congrats (and a bunch of thanks) to William Burrow and
> Gianluca Renzi for their finding, testing, reporting (finally, «time
> spent») and the overall well job done! :-)
>
> > > Well, it seems pretty likely that you get the "copyright symbol",
> > > because ch gets assigned "0".  The question is: Why does this happen?
> > > It shouldn't.
> > >
> > > Does it only happens with old kernels (5.x), or does it happen with
> > > latest
> > > Linux kernels (>= 6.8) too?
> > The issue is not present with the kernel 5.10.0-36-amd64, only in kernel
> > 5.10.0-37-amd64 (5.10.247-1)
> >
> > I have a couple of Debian 12 machines laying around, and this bug is not
> > present for sure.
> >
> > I do not remember which kernel they can have, but it's the stable Debian 12
> > version.
>
> (...)
>
> Well, I do confirm I CANNOT reproduce the «©©©©©©©©©©©©©©©©©©©©©©©©©©©©»
> copyright issue neither on my Debian testing (kernel image
> 6.17.9+deb14) nor Debian stable (kernel image 6.1.0-41).

That's good.
Could you please try a second patch, where you replace both occurances of:
	ch = (charcnt - 1);
by:
	ch = 0x20; /* ASCII space char */
?

If that works, we maybe should use this approach....

Helge