Truoble with 8-pixel screen fonts and 2.6 kernels (2.6.9, 2.6.10)

Truoble with 8-pixel screen fonts and 2.6 kernels (2.6.9, 2.6.10)

[Alexander E. Patrakov]

(This report is on behalf of Declan Moriarty)

To reproduce the problem, install the "kbd" package, and from the first
virtual console execute the following command:

setfont lat1-08          # or any other 8-pixel font

Then switch to the second console and see that the cursor disappeared.
Moreover, the following escape sequences function improperly:

echo -e '\033[?Xc' where X is a digit

Even more, from the second console this command

setfont lat1-16

gives 43 screen lines with only upper halves of characters (bottoms are cut,
and I suspect this also happens with the cursor).

Looks like a bug in the character cell height logic. Could you please fix it
or at least point me to some overview of the relevant source files?

-- 
Alexander E. Patrakov

Re: Trouble with 8-pixel screen fonts and 2.6 kernels (2.6.9, 2.6.10)

[Alexander E. Patrakov]

Alexander E. Patrakov wrote:

> (This report is on behalf of Declan Moriarty)
> 
> To reproduce the problem, install the "kbd" package, and from the first
> virtual console execute the following command:
> 
> setfont lat1-08          # or any other 8-pixel font

Forgot to say that this bug is reproducible only on non-framebuffer console.

> Then switch to the second console and see that the cursor disappeared.
> Moreover, the following escape sequences function improperly:
> 
> echo -e '\033[?Xc' where X is a digit
> 
> Even more, from the second console this command
> 
> setfont lat1-16
> 
> gives 43 screen lines with only upper halves of characters (bottoms are
> cut, and I suspect this also happens with the cursor).
> 
> Looks like a bug in the character cell height logic. Could you please fix
> it or at least point me to some overview of the relevant source files?

This bug seems to be Radeon-specific (doesn't exist on ATI Mach64). But even
on Radeons, it can't be reproduced in 2.4 kernels - so it's a kernel bug.

-- 
Alexander E. Patrakov