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Bug#362977: marked as done (xserver-xorg-video-i810: framebuffer offset by 32k pixels)

Your message dated Tue, 26 Sep 2006 22:43:00 +0200
with message-id <200609262243.08757.Gunter@ohrner.net>
and subject line Bug#362977: i855G support in Debian
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what I am
talking about this indicates a serious mail system misconfiguration
somewhere.  Please contact me immediately.)

Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message --- 
Package: xserver-xorg-video-i810
Version: 1:1.5.1.0-2
Severity: important

Since I upgraded my Toshiba Libretto U105 to use the new xserver-xorg
from unstable, Xorg will shift the graphical display contents by about
25 lines downwards and 768 pixels rightwards, wrapping lines around.
The result is not quite usable.

All in all that's 32768 pixels, at 4 bytes per pixel, a 128KiB offset.
This upper section of the screen is originally filled with contents of
the previous VT, and slowly being filled by regular patterns, about
26 pixels at a time, about one burst per second.

In the X log, I see notably:

(--) PCI:*(0:2:0) Intel Corporation 82852/855GM Integrated Graphics
Device rev 2, Mem @ 0xd8000000/27, 0xd0000000/19, I/O @ 0xeff8/3
(--) PCI: (0:2:1) Intel Corporation 82852/855GM Integrated Graphics
Device rev 2, Mem @ 0x20000000/27, 0x2a000000/19
...
(--) I810(0): Virtual size is 1280x768 (pitch 1280)
(**) I810(0): *Built-in mode "1280x768"
...
(II) I810(0): Attempting to use 61.11Hz refresh for mode "1280x768" (862)
...
(==) Depth 24 pixmap format is 32 bpp
(II) I810(0): Rotating to 0 degrees
(II) I810(0): initializing int10
(II) I810(0): Primary V_BIOS segment is: 0xc000
(II) I810(0): VESA BIOS detected
(II) I810(0): Allocated 128 kB for the ring buffer at 0x0
(II) I810(0): Allocating at least 256 scanlines for pixmap cache
(II) I810(0): Initial framebuffer allocation size: 7680 kByte
(II) I810(0): Allocated 4 kB for Overlay registers at 0x7fff000 (0x1491b000).
(II) I810(0): Allocated 64 kB for the scratch buffer at 0x7fef000
(II) I810(0): 0x82070d0: Memory at offset 0x00020000, size 7680 kBytes
(II) I810(0): 0x820b748: Memory at offset 0x00000000, size 0 kBytes
(II) I810(0): 0x820b940: Memory at offset 0x00000000, size 0 kBytes
(II) I810(0): 0x820b5fc: Memory at offset 0x00000000, size 128 kBytes
(II) I810(0): 0x8207110: Memory at offset 0x07fef000, size 64 kBytes
(II) I810(0): 0x820b998: Memory at offset 0x07fff000, size 4 kBytes
(WW) I810(0): PRB0_CTL (0x0000f001) indicates ring buffer enabled

As far as I can tell, mode switching happens only through the BIOS,
and the attempt to offset the framebuffer away from the start of the
video memory may well be ill-fated. In any case, this ring buffer
allocation seems to me as being premature and causing the bug.

I haven't kept logs from previous working versions of the server;
if the information may help you, I'll send it when I have successfully
downgraded my xserver (ouch, a whole lot of stuff needs to be co-downgraded).

[ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ]
The risk is that if, one day, machines become intelligent,
we mightn't be mentally equipped to notice they are.
                -- Tirésias, in J.-P. Petit, "A quoi rêvent les robots?"

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15.3-blefuscu
Locale: LANG=en_US.iso-8859-1, LC_CTYPE=en_US.iso-8859-1
(charmap=ISO-8859-1) (ignored: LC_ALL set to en_US.iso-8859-1)

Versions of packages xserver-xorg-video-i810 depends on:
ii  libc6                         2.3.6-7    GNU C Library: Shared libraries
ii  xserver-xorg-core             1:1.0.2-4  X.Org X server -- core server

xserver-xorg-video-i810 recommends no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
Version: 1.6.5-3

Am Freitag, 21. Juli 2006 10:56 schrieb Michel Dänzer:
> All the above indeed suggests that the problem is specific to your
> system (or at least a very small set of systems). It would be great if
> you could check upstream whether it's fixed in current xf86-video-intel

The new version of the i810 X.org driver in Debian since August seems to 
fix these problems.

It's the first version since the X.org 6.8.2 package in Debian which is 
able to display an ungarbled desktop on my system or doesn't crash 
immediately on server start.

Very nice. :-)))

Greetings,

  Gunter

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