Description of Problem:

X (from -4.0.99) hangs on my system on startup. Last output was


| (II) Module i2c: vendor="The XFree86 Project"
|        compiled for 4.0.99.900, module version = 1.2.0

With XFree86-4.0.3 a warning follows, but then all things are fine:

| (II) Module i2c: vendor="The XFree86 Project"
|         compiled for 4.0.3, module version = 1.2.0
| (WW) MGA(0): Failed to set up write-combining range
(0xe2000000,0x1800000)
| (II) MGA(0): I2C bus "DDC" initialized.


gdb shows that X loops between 0x8098362 and 0x8098371 (sorry, I have not
compiled debug-symbols into):

-------------
0x8098359:      lea    0x0(%edi,1),%edi
0x8098360:      sar    %ebx
0x8098362:      cmp    %esi,%ebx
0x8098364:      jg     0x8098360
0x8098366:      mov    %edi,%eax
0x8098368:      cltd   
0x8098369:      idiv   %ebx,%eax
0x809836b:      test   %edx,%edx
0x809836d:      je     0x80983c0
0x809836f:      test   %ebx,%ebx
0x8098371:      jne    0x8098362
0x8098373:      test   %ebx,%ebx
0x8098375:      jne    0x809838d
0x8098377:      sub    $0x4,%esp

(gdb) info reg
eax            0x0      0
ecx            0xffffffff       -1
edx            0xe2000000       -503316480
ebx            0x80000000       -2147483648
esp            0xbffff6f0       0xbffff6f0
ebp            0xbffff708       0xbffff708
esi            0x1800000        25165824
edi            0xe2000000       -503316480
eip            0x809836b        0x809836b
--------------

/var/log/messages says

--------------
May 29 18:40:59 kosh kernel: Linux agpgart interface v0.99 (c) Jeff
Hartmann 
May 29 18:40:59 kosh kernel: agpgart: Maximum main memory to use for agp
memory: 203M 
May 29 18:40:59 kosh kernel: agpgart: Detected Intel 440BX chipset 
May 29 18:40:59 kosh kernel: agpgart: AGP aperture is 64M @ 0xe4000000 
May 29 18:41:01 kosh kernel: [drm] AGP 0.99 on Intel 440BX @ 0xe4000000
64MB 
May 29 18:41:01 kosh kernel: [drm] Initialized mga 2.0.1 20000928 on minor
63 
...
ay 29 18:47:35 kosh kernel: mtrr: base(0xe2000000) is not aligned on a
size(0x1800000) boundary 
May 29 18:47:36 kosh kernel: mtrr: no MTRR for e3800000,800000 found 
May 29 18:47:36 kosh kernel: mtrr: base(0xe2000000) is not aligned on a
size(0x1800000) boundary 
May 29 18:47:57 kosh kernel: mtrr: base(0xe2000000) is not aligned on a
size(0x1800000) boundary
-----------------

How Reproducible:

everytime

Steps to Reproduce:
1. X

Actual Results:

hangup


Expected Results:

gray screen


Additional Information:
	
$ lspci -v
...
00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev
03) (prog-if 00 [Normal decode])
        Flags: bus master, 66Mhz, medium devsel, latency 64
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
        Memory behind bridge: e0000000-e0ffffff
        Prefetchable memory behind bridge: e1f00000-e3ffffff
00:0a.0 Multimedia video controller: Brooktree Corporation Bt848 TV with
DMA push (rev 12)
        Flags:bus master, medium devsel, latency 32, IRQ 3
        Memory at e1000000 (32-bit, prefetchable) [size=4K]
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev
82) (prog-if 00 [VGA])
        Subsystem: Matrox Graphics, Inc.: Unknown device 0641
        Flags: bus master, medium devsel, latency 64, IRQ 11
        Memory at e2000000 (32-bit, prefetchable) [size=32M]
        Memory at e0800000 (32-bit, non-prefetchable) [size=16K]
        Memory at e0000000 (32-bit, non-prefetchable) [size=8M]
        Expansion ROM at e1fe0000 [disabled] [size=128K]
        Capabilities: [dc] Power Management version 2
        Capabilities: [f0] AGP version 2.0
...

$ cat /proc/mtrr
reg00: base=0x00000000 (   0MB), size= 256MB: write-back, count=1
reg01: base=0xe4000000 (3648MB), size=  64MB: write-combining, count=1
reg05: base=0xe2000000 (3616MB), size=  32MB: write-combining, count=3


tested with XFree86-4.0.99.900-0.2.[13].i386.rpm; XFree86-4.0.3-15 works
fine
kernel is the original 2.4.5 one

XF86Config will be attached