patch 4.6.99.17-4.6.99.18.diff.bz2 breaks i810 driver on Dell machines

[loic.mahe@xxxxxxxxxxxxxx]

Hello,

I'm building XFree86 4.6+patches for
a selection of computers with various video chipsets.
The kernel is a 2.4.34.

I found that the patch 4.6.99.17-4.6.99.18.diff.bz2
breaks the i810 driver for the Intel
graphic chipset on these two Dell computers
:

- Dell Optiplex GX270 / i865G
- Dell Optiplex GX280 / i915G

But note that this computer works well
: Dell Optiplex GX260 / i845G

The syndrome : as soon as X startx,
the screen becomes dark and the text consoles become unusable too
(but the system doesn't crash). I can
see this in /var/log/XFree86.0.log (this example is for the i915G) :

[...]
(--) Chipset 915G found
(II) resource ranges after xf86ClaimFixedResources()
call:
[...]
(II) Found conflict at: 0x3df
(II) Found conflict at: 0x3bb
(WW) ****INVALID IO ALLOCATION**** b:
0xe898 e: 0xe89f correcting^G
(II) window:
        [0] -1  0
      0x00000000 - 0x0000ffff (0x10000) IX[B]
(II) resSize:
        [0] -1  0
      0x00000000 - 0xffffffff (0x0) IX[B]
(II) window fixed:
        [0] -1  0
      0x00000000 - 0x0000ffff (0x10000) IX[B]

and the log file stops here.

Moreover, I have the same graphic chipsets
(i865G and i915G) on non-Dell motherboards
(MSI or Intel motherboards) and they
work perfectly here. So I suspect that the problem comes from
the Dell BIOS. Dell BIOSes are mostly
not configurable, as you may know, and I didn't find a parameter
which could be related to the problem.

There are some pci-related files which
are altered by the patch, the error probably comes from there.

Loïc, Toulouse, France