pixel corruption in wide xterms

[J.R. Oldroyd]

On Thu, 15 Nov 2007 15:35:45 -0500, Thomas Dickey <dickey at radix.net> wrote:
>
> On Thu, Nov 15, 2007 at 12:11:49PM -0500, J.R. Oldroyd wrote:
> > Since being advised a couple of weeks ago on this list to switch from
> > the xf86-video-i810 driver to the xf86-video-intel driver, I am seeing
> > pixel corruption in xterm windows.
> > 
> > The pixel corruption consists of collections of lit pixels where there
> > are no characters and, occasionally, also unlit pixels where there are
> > characters.  These corrupted areas scroll with the xterm.  The
> > corruption happens only on wide xterms, seemingly when columns >= 158,
> > which is often the case for me as I use a 1600x1200 display and an xterm
> > font size that can fit up to 175 columns in a maximized xterm window.
> > It also seems to happen only at the left of the screen.
> 
> I think xterm's innocent here, but I am curious.  A few comments which
> may be useful to whoever's responsible for the driver:
> 
> Does the glitch happen if the xterm isn't positioned at the left-margin of the
> screen? 
> 
Yes.

But I notice that it does depend on how many lines of the xterm window
are on the screen.  If I move the window partially off the screen the
problem persists until < 158 columns remain on the screen.  As soon as
157 or less columns are on the screen, the problem goes away, even though
the xterm window is still larger.

> Does this happen in remote xterms, or just the local?
> 
It also happens if I log into a remote host then run a remote
xterm back to this display.

	-jr

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-x11/attachments/20071115/ceabe7a3/signature.pgp