Re: console bleeds

Andries.Brouwer@cwi.nl
Thu, 14 Mar 1996 09:20:30 +0100


Aaron Ucko:

::: Sorry Linus, but I am still getting console bleeds in 71. I was using tty2
::: for telnet over a slow ppp link and tty3 for an ftp over the same link.
::: tty4 and later on tty6, had some of the text from tty3 shifted to the left.
::: tty4 was not being used except by agetty and tty6 was idle. After that I
::: tried switching VCs around a lot, and tty2 and 3 got corrupted with text
::: from other VCs and the text wasn't shifted to the left.

: All of this behavior occurs in both old and new kernels.

Yesterday, or perhaps the day before, I looked at console.c.
There is a bad bug in patch 1.3.3 that was supposed to give
improved scrolling. This bug is enough to explain all reports
about console problems (and possibly some others as well:
a scrolling console that is not the foreground console might
scribble on random memory). Hope to submit a patch soon.

However, if anyone has a problem with old kernels (where old
means 1.2.*, or anything else before 1.3.3), then there is
something else wrong as well.

Andries