While SNAFU still reigns supreme I overcame the GPU stoppage. I noticed in Windows system tray that GPU computing was "disabled at user request". Wrong. Actually I'd set BOINC to 'use GPU while computer is in use' but that factoid was ignored.
Bull in the china shop, I deleted BOINC directories and started all over again. Presto! GPU computing is working. My regrets to all the inconvenienced wingmen. I plan to stick with 6.12.34(64) for a while. This all started when I installed BOINC 7.0.25(x64) and Nvidia 301.42.
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Situation normal in the SNAFU sense. I just upgraded to Nvidia 301.42 and Boinc 7.0.25(x64). Suddenly my GPU is at idle, no GPU work although I have downloaded GPU work in my queue from Collatz and Primegrid. Its not running.
GPU Caps Viewer says the GPU core is idling along at 50MHz, load near zero. Here's a copy of Boinc startup event log. Any experts see a clue here?
PS - thinking "corruption" I reinstalled Nvidia, no improvement.
Thanks Art
6/6/2012 6:19:09 PM | | Starting BOINC client version 7.0.25 for windows_x86_64
6/6/2012 6:19:09 PM | | log flags: file_xfer, sched_ops, task
6/6/2012 6:19:09 PM | | Libraries: libcurl/7.21.6 OpenSSL/1.0.0d zlib/1.2.5
6/6/2012 6:19:09 PM | | Data directory: D:\boinc
6/6/2012 6:19:09 PM | | Running under account Art
6/6/2012 6:19:09 PM | | Processor: 4 GenuineIntel Intel(R) Core(TM)2 Quad CPU Q9650 @ 3.00GHz [Family 6 Model 23 Stepping 10]
6/6/2012 6:19:09 PM | | Processor: 6.00 MB cache
6/6/2012 6:19:09 PM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 sse4_1 syscall nx lm vmx smx tm2 pbe
6/6/2012 6:19:09 PM | | OS: Microsoft Windows 7: Ultimate x64 Edition, Service Pack 1, (06.01.7601.00)
6/6/2012 6:19:09 PM | | Memory: 6.00 GB physical, 12.00 GB virtual
6/6/2012 6:19:09 PM | | Disk: 238.24 GB total, 194.69 GB free
6/6/2012 6:19:09 PM | | Local time is UTC -6 hours
6/6/2012 6:19:09 PM | | NVIDIA GPU 0: GeForce GTX 560 Ti (driver version 301.42, CUDA version 4.20, compute capability 2.1, 1024MB, 914MB available, 1352 GFLOPS peak)
6/6/2012 6:19:09 PM | | OpenCL: NVIDIA GPU 0: GeForce GTX 560 Ti (driver version 301.42, device version OpenCL 1.1 CUDA, 1024MB, 914MB available)
6/6/2012 6:19:09 PM | Milkyway@Home | Found app_info.xml; using anonymous platform
6/6/2012 6:19:09 PM | SETI@home | Found app_info.xml; using anonymous platform
6/6/2012 6:19:09 PM | | Config: use all coprocessors
6/6/2012 6:19:09 PM | Collatz Conjecture | URL
http://boinc.thesonntags.com/collatz/; Computer ID 19418; resource share 100
6/6/2012 6:19:09 PM | Einstein@Home | URL
http://einstein.phys.uwm.edu/; Computer ID 5411865; resource share 1000
6/6/2012 6:19:09 PM | Milkyway@Home | URL
http://milkyway.cs.rpi.edu/milkyway/; Computer ID 100603; resource share 100
6/6/2012 6:19:09 PM | SETI@home | URL
http://setiathome.berkeley.edu/; Computer ID 5451708; resource share 100
6/6/2012 6:19:09 PM | PrimeGrid | URL
http://www.primegrid.com/; Computer ID 170826; resource share 100
6/6/2012 6:19:09 PM | | General prefs: from
http://bam.boincstats.com/ (last modified 18-Jul-2011 09:02:19)
6/6/2012 6:19:09 PM | | Computer location: home
6/6/2012 6:19:09 PM | | General prefs: no separate prefs for home; using your defaults
6/6/2012 6:19:09 PM | | Preferences:
6/6/2012 6:19:09 PM | | max memory usage when active: 4607.37MB
6/6/2012 6:19:09 PM | | max memory usage when idle: 5836.00MB
6/6/2012 6:19:09 PM | | max disk usage: 100.00GB
6/6/2012 6:19:09 PM | | (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
6/6/2012 6:19:09 PM | | Not using a proxy