> I seem to be the only person on planet Earth having real real issues
 > with UXA, and noticeably less issues with EXA.

I had many freezes with UXA too, not so with EXA, at least with Virtual
2048 2048 (shall I try without Virtual? I only remember freezes with
UXA).

My system: 
Thinkpad X300


00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 
Integrated Graphics Controller [8086:2a02] (rev 0c)
        Subsystem: Lenovo Device [17aa:20b5]                                    
                                                  
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+                     
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-                      
        Latency: 0                                                              
                                                  
        Interrupt: pin A routed to IRQ 2297                                     
                                                  
        Region 0: Memory at fa000000 (64-bit, non-prefetchable) [size=1M]       
                                                  
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]         
                                                  
        Region 4: I/O ports at 1800 [size=8]                                    
                                                  
        Capabilities: <access denied>                                           
                                                  
        Kernel modules: intelfb                                                 
                                                  

00:02.1 Display controller [0380]: Intel Corporation Mobile GM965/GL960 
Integrated Graphics Controller [8086:2a03] (rev 0c)
        Subsystem: Lenovo Device [17aa:20b5]                                    
                                           
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-              
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-               
        Latency: 0                                                              
                                           
        Region 0: Memory at fa100000 (64-bit, non-prefetchable) [size=1M]       
                                           
        Capabilities: <access denied>   

and excerpt from xorg.conf:


Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Configured Monitor"
        Device          "Configured Video Device"
        #       Input   "Synaptics Touchpad"
        SubSection "Display"
        depth   24
        virtual 2048 2048
        EndSubSection
EndSection

Section "ServerLayout"
        Identifier "Default Layout"
        Screen  "Default Screen"
        #       InputDevice     "Synaptics Touchpad"
        #       InputDevice     "Trackpoint"
EndSection

Section "Device"
        Identifier      "Configured Video Device"
        Driver  "intel"
        Option "AccelMethod" "EXA"
        Option "MigrationHeuristic" "greedy"
EndSection

-- 
[i965] X freezes starting on April 3rd
https://bugs.launchpad.net/bugs/359392
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