Computation of Einstein@home has been using integrated Intel HD Graphics 520, Skylake GT2, for months, but recently BOINC 7.14.2 stopped "seeing" the GPU. It's an ASUS laptop running Win10 home version, 64 bit

I seek to solve this prolem, if I can...

Here's an extract from the BOINC log

12/14/19 01:42:32 | | cc_config.xml not found - using defaults
12/14/19 01:42:32 | | Starting BOINC client version 7.14.2 for windows_x86_64
12/14/19 01:42:32 | | log flags: file_xfer, sched_ops, task
12/14/19 01:42:32 | | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
12/14/19 01:42:32 | | Data directory: C:\ProgramData\BOINC
12/14/19 01:42:32 | | Running under account Owner
12/14/19 01:42:33 | | OpenCL CPU: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 7.6.0.0814, device version OpenCL 2.1 (Build 0))
12/14/19 01:42:33 | | No usable GPUs found
12/14/19 01:42:33 | | app version refers to missing GPU type intel_gpu
12/14/19 01:42:33 | Einstein@Home | Application uses missing intel_gpu GPU
12/14/19 01:42:33 | | app version refers to missing GPU type intel_gpu
12/14/19 01:42:33 | Einstein@Home | Application uses missing intel_gpu GPU
12/14/19 01:42:33 | Einstein@Home | Missing coprocessor for task LATeah1062L19_388.0_0_0.0_11544218_0
12/14/19 01:42:33 | Einstein@Home | Missing coprocessor for task LATeah1062L19_388.0_0_0.0_15445570_0
12/14/19 01:42:33 | Einstein@Home | Missing coprocessor for task LATeah1062L20_332.0_0_0.0_32194309_1
12/14/19 01:42:33 | | Host name: DESKTOP-MPB0NIH
12/14/19 01:42:33 | | Processor: 4 GenuineIntel Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz [Family 6 Model 78 Stepping 3]
12/14/19 01:42:33 | | 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 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx tm2 pbe fsgsbase bmi1 smep bmi2
12/14/19 01:42:33 | | OS: Microsoft Windows 10: Core x64 Edition, (10.00.18362.00)
12/14/19 01:42:33 | | Memory: 7.87 GB physical, 9.12 GB virtual
12/14/19 01:42:33 | | Disk: 465.13 GB total, 418.11 GB free
12/14/19 01:42:33 | | Local time is UTC -7 hours
12/14/19 01:42:33 | | No WSL found.

There's this post about it.
(Message 91833 from Richard.)

Did you do/get a Windows update about the time in question?

There's this post about it.

I see I wrote 'testing of the new client should start either over this weekend, or during the week commencing 17 June 2019.'

Well, testing did start (rather later than that), and there is a version 7.16.3 available for the strong of heart. But it isn't finished yet, and the latest information I heard this past week is that another round of testing may start around this next Tuesday, or 17 December 2019.

That's a good question. I'm not really sure, but it is possible
that Microsoft has somehow stabbed me in the back.

I just installed BOINC 7.16.3, and it seems to be working fine, now.

Here's hoping all will continue to be well until a finalized version comes out.

I've turned off the screensaver, in case there might be4 issues there.

As long as it processes data, I'm happy

Well, that tests part of 7.16.3, and it seems to work. :)

Hi everyone, I have a similar problem because Boinc stopped recognizing 2 form 4 GPUs so hope this is a right place to describe my case. I use two AMD Radeon Pro Duo graphics cards and sudendly without any configuration and hardware changes Boinc sees only 2 devices instead of 4.
I have tried to upgrade /downgrade graphic drivers, reinstal Boinc, configure cc_config to use all GPUs, changing projects... All without any success.
I have no idea what to do next to retrieve lost gpu's. Maybe you will help? Here are the logs before and after I lost GPUs.


Right:
12-Feb-2020 18:28:48 [---] cc_config.xml not found - using defaults
12-Feb-2020 18:28:48 [---] Starting BOINC client version 7.14.2 for windows_x86_64
12-Feb-2020 18:28:48 [---] log flags: file_xfer, sched_ops, task
12-Feb-2020 18:28:48 [---] Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
12-Feb-2020 18:28:48 [---] Data directory: C:\ProgramData\BOINC
12-Feb-2020 18:28:48 [---] Running under account GRG
12-Feb-2020 18:28:49 [---] OpenCL: AMD/ATI GPU 0: Radeon (TM) Pro Duo (driver version 3004.7, device version OpenCL 2.0 AMD-APP (3004.7), 4096MB, 4096MB available, 8192 GFLOPS peak)
12-Feb-2020 18:28:49 [---] OpenCL: AMD/ATI GPU 1: Radeon (TM) Pro Duo (driver version 3004.7, device version OpenCL 2.0 AMD-APP (3004.7), 4096MB, 4096MB available, 8192 GFLOPS peak)
12-Feb-2020 18:28:49 [---] OpenCL: AMD/ATI GPU 2: Radeon (TM) Pro Duo (driver version 3004.7, device version OpenCL 2.0 AMD-APP (3004.7), 4096MB, 4096MB available, 8192 GFLOPS peak)
12-Feb-2020 18:28:49 [---] OpenCL: AMD/ATI GPU 3: Radeon (TM) Pro Duo (driver version 3004.7, device version OpenCL 2.0 AMD-APP (3004.7), 4096MB, 4096MB available, 8192 GFLOPS peak)
12-Feb-2020 18:28:49 [---] OpenCL CPU: Intel(R) Xeon(R) CPU E5-2660 v4 @ 2.00GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 6.4.0.25, device version OpenCL 2.0 (Build 25))
12-Feb-2020 18:28:49 [---] Host name: BOINC9
12-Feb-2020 18:28:49 [---] Processor: 56 GenuineIntel Intel(R) Xeon(R) CPU E5-2660 v4 @ 2.00GHz [Family 6 Model 79 Stepping 1]
12-Feb-2020 18:28:49 [---] 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 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx smx tm2 dca pbe fsgsbase bmi1 hle smep bmi2
12-Feb-2020 18:28:49 [---] OS: Microsoft Windows 10: Professional x64 Edition, (10.00.18363.00)
12-Feb-2020 18:28:49 [---] Memory: 15.89 GB physical, 18.26 GB virtual
12-Feb-2020 18:28:49 [---] Disk: 222.46 GB total, 125.76 GB free
12-Feb-2020 18:28:49 [---] Local time is UTC +1 hours
12-Feb-2020 18:28:49 [---] No WSL found.
12-Feb-2020 18:28:49 [collatz] URL https://boinc.thesonntags.com/collatz/; Computer ID 859669; resource share 100
12-Feb-2020 18:28:49 [PrimeGrid] URL http://www.primegrid.com/; Computer ID 970505; resource share 100
12-Feb-2020 18:28:49 [RNA World] URL http://www.rnaworld.de/rnaworld/; Computer ID 78921; resource share 100
12-Feb-2020 18:28:49 [---] General prefs: from http://www.gpugrid.net/ (last modified 02-Aug-2019 15:00:31)
12-Feb-2020 18:28:49 [---] Host location: none
12-Feb-2020 18:28:49 [---] General prefs: using your defaults
12-Feb-2020 18:28:49 [---] Reading preferences override file
12-Feb-2020 18:28:49 [---] Preferences:
12-Feb-2020 18:28:49 [---] max memory usage when active: 16270.78 MB
12-Feb-2020 18:28:49 [---] max memory usage when idle: 16270.78 MB
12-Feb-2020 18:28:50 [---] max disk usage: 100.00 GB
12-Feb-2020 18:28:50 [---] (to change preferences, visit a project web site or select Preferences in the Manager)
12-Feb-2020 18:28:50 [---] Setting up project and slot directories
12-Feb-2020 18:28:50 [---] Checking active tasks
12-Feb-2020 18:28:50 [---] Setting up GUI RPC socket
12-Feb-2020 18:28:50 [---] Checking presence of 2406 project files
12-Feb-2020 18:28:50 Initialization completed

Not right:
09.03.2020 21:28:22 | | Starting BOINC client version 7.14.2 for windows_x86_64
09.03.2020 21:28:22 | | log flags: file_xfer, sched_ops, task
09.03.2020 21:28:22 | | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
09.03.2020 21:28:22 | | Data directory: C:\ProgramData\BOINC
09.03.2020 21:28:22 | | Running under account GRG
09.03.2020 21:28:22 | | OpenCL: AMD/ATI GPU 0: Radeon (TM) Pro Duo (driver version 3004.8, device version OpenCL 2.0 AMD-APP (3004.8), 4096MB, 4096MB available, 8192 GFLOPS peak)
09.03.2020 21:28:22 | | OpenCL: AMD/ATI GPU 1: Radeon (TM) Pro Duo (driver version 3004.8, device version OpenCL 2.0 AMD-APP (3004.8), 4096MB, 4096MB available, 8192 GFLOPS peak)
09.03.2020 21:28:22 | | OpenCL CPU: Intel(R) Xeon(R) CPU E5-2660 v4 @ 2.00GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 6.4.0.25, device version OpenCL 2.0 (Build 25))
09.03.2020 21:28:22 | | Host name: BOINC9
09.03.2020 21:28:22 | | Processor: 56 GenuineIntel Intel(R) Xeon(R) CPU E5-2660 v4 @ 2.00GHz [Family 6 Model 79 Stepping 1]
09.03.2020 21:28:22 | | 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 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx smx tm2 dca pbe fsgsbase bmi1 hle smep bmi2
09.03.2020 21:28:22 | | OS: Microsoft Windows 10: Professional x64 Edition, (10.00.18363.00)
09.03.2020 21:28:22 | | Memory: 15.89 GB physical, 18.26 GB virtual
09.03.2020 21:28:22 | | Disk: 222.46 GB total, 111.80 GB free
09.03.2020 21:28:22 | | Local time is UTC +1 hours
09.03.2020 21:28:22 | | No WSL found.
09.03.2020 21:28:22 | | Config: use all coprocessors
09.03.2020 21:28:22 | Milkyway@Home | URL http://milkyway.cs.rpi.edu/milkyway/; Computer ID 830773; resource share 100
09.03.2020 21:28:22 | PrimeGrid | URL http://www.primegrid.com/; Computer ID 970505; resource share 100
09.03.2020 21:28:22 | RNA World | URL http://www.rnaworld.de/rnaworld/; Computer ID 78921; resource share 100
09.03.2020 21:28:27 | | General prefs: from http://www.gpugrid.net/ (last modified 02-Aug-2019 15:00:31)
09.03.2020 21:28:27 | | Host location: none
09.03.2020 21:28:27 | | General prefs: using your defaults
09.03.2020 21:28:27 | | Preferences:
09.03.2020 21:28:27 | | max memory usage when active: 16270.78 MB
09.03.2020 21:28:27 | | max memory usage when idle: 16270.78 MB
09.03.2020 21:28:27 | | max disk usage: 100.00 GB
09.03.2020 21:28:27 | | (to change preferences, visit a project web site or select Preferences in the Manager)
09.03.2020 21:28:27 | | Setting up project and slot directories
09.03.2020 21:28:27 | | Checking active tasks

Considered that perhaps one of the cards is dead, has come loose from its PCIe slot (thus reseat it), or that it's without sufficient power (check your PSU, check cables)?

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Thank you for a fast response. I tried to turn off graphic cards in Windows device manager. If I turn off the first card in device manager, GPU device 0 stops counting. If the second graphic card is turned off, GPU device 1 stops working in BOINC Manager. That’s why I thought that both cards are working, but BOINC cannot utilize the second GPU on each card.
But frankly speaking I don’t know how Windows should recognize Pro Duo cards. Maybe there should be 4 cards instead of 2 in device manager like it is now and your remark is excellent. I have no physical access to the computer now, but I will check it tomorrow and let know.

Considered that perhaps one of the cards is dead, has come loose from its PCIe slot (thus reseat it), or that it's without sufficient power (check your PSU, check cables)?

I have checked the physical connection of both cards and it looks ok. Cards are working as usual - leds are blinking and coolers are turning, they are also hot. I also asked AMD if I should see 4GPUs or 2 in a task manager or Radeon Software and their answer is "Please be informed that you have two Radeon Pro Duo graphic cards , Radeon software will show the GPUs as GPU1 and GPU2 and its normal".
I still have no idea why BOINC Manager showed 4 devices and without any hardware changes or even computer or BOINCs Manager reset I suddendly lost 2/4 devices? Any ideas what to check next? Maybe Windows reinstallation?

No don't go that far. I'll search in moment, but we have had reports from people they saw more than their GPU count in BOINC, cards that weren't there. So you may have had that happen, may be a glitch in how OpenCL is detected.

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See https://boinc.berkeley.edu/dev/forum_thread.php?id=13350 for how another user dealt with his phantom GPUs. Chances are you are dealing with phantom GPUs as well.

You can always PM that user to ask if he fixed his problems.

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Jord, thanks to your hint I have my 4 GPUs back. The key was to edit coproc_info.xml file. In my case I have doubled </ati_opencl> entry. It is very important to make the coproc_info read only, because BOINC Manager will modify it during a start. Thanks once again!