Public bug reported:

Binary package hint: xorg

Not long after X starts and the mouse pointer appears, it changes to a
"loading circle" a fraction of a second after doing this, the computer
completely freezes. There's no way of getting to a terminal to get any
sort of output as the machine completely locks, there is no unusual
output whilst booting if splash and quiet are removed. I'm not sure how
much more information I can possibly give, but I've been trying daily
builds every other day for two months now and every single one has done
exactly this in exactly the same place.

I have tried safe graphics mode and normal graphics mode but there is no
difference, in all previous versions of Ubuntu only safe graphics mode
has worked, normal mode produces corruption (there is already a bug
about this for 7800GTs https://bugs.launchpad.net/ubuntu/+source
/xserver-xorg-video-nv/+bug/62230). This bug is different though as it
occurs both when the nv driver AND the vesa driver are used. Also, there
is no corruption, simply a freeze.

Output of lspci:
00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2)
00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3)
00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1)
00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2)
00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1)
00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3)
00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3)
00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3)
00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2)
00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3)
00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3)
00:0e.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3)
00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] 
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address 
Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM 
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] 
Miscellaneous Control
01:07.0 Network controller: Texas Instruments ACX 111 54Mbps Wireless Interface
01:08.0 Multimedia audio controller: Creative Labs SB Audigy (rev 03)
01:08.1 Input device controller: Creative Labs SB Audigy Game Port (rev 03)
01:08.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port
01:0b.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000 
Controller (PHY/Link)
03:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7800 GT] 
(rev a1)

If anything else is needed, or if anyone knows of anyway I can get some
output from X before it hard locks, please let me know!

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Intrepid live CD freeze while loading X
https://bugs.launchpad.net/bugs/275488
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