Public bug reported:

The problem is a total random freeze with unity 3d, i solve the problem
with unity 2d. I suspect radeon driver (Gallium 0.4 on ATI RV515) don't
interpret correctly 3d instructions.

lspci output:
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub 
(rev 02)
00:01.0 PCI bridge: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 
02)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio 
Controller (rev 01)
00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller 
#1 (rev 01)
00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller 
#2 (rev 01)
00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller 
#3 (rev 01)
00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller 
#4 (rev 01)
00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller 
(rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GH (ICH7DH) LPC Interface Bridge 
(rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller 
(rev 01)
00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA Controller [IDE 
mode] (rev 01)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV516 
XT Radeon X1600 Series (Primary)
01:00.1 Display controller: Advanced Micro Devices [AMD] nee ATI RV516 XT 
Radeon X1600 Series (Secondary)
02:01.0 FireWire (IEEE 1394): LSI Corporation FW322/323 (rev 70)
02:03.0 Ethernet controller: Atheros Communications Inc. AR5413/AR5414 Wireless 
Network Adapter [AR5006X(S) 802.11abg] (rev 01)
02:04.0 Multimedia controller: Philips Semiconductors SAA7131/SAA7133/SAA7135 
Video Broadcast Decoder (rev d1)
02:08.0 Ethernet controller: Intel Corporation N10/ICH 7 Family LAN Controller 
(rev 01)

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/999645

Title:
  Freeze with unity 3d

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