Mixed nvidia and AMD drivers
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Message boards : Number crunching : Mixed nvidia and AMD drivers

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Profile Stephen Uitti
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Message 19754 - Posted: 2 Aug 2014, 17:43:04 UTC

I've just discovered that my AMD A8-6600K APU does OpenCL. That is, the video chip on the 4 core CPU should be able to crunch Collatz. This system has a 2011 vintage Nvidia GTS 250 crunching, and doing a good job. But the video on the CPU chip could be similar performance, from what little i was able to find. The AMD driver suggests that i should uninstall my Nvidia driver first. Of course, i don't want to do that. What i want to do is run both. For various reasons, i don't want to goof with it right away, maybe in a week or two. I'm curious if anyone has any experience with this mix of drivers. Oh, it's an Ubuntu Linux system (Mint, really, but Mint is derived from Ubuntu). One crazy idea is to run one of the cards in VirtualBox. So one copy of Linux would have the Nvidia driver, and the other would have the AMD driver. There's plenty of RAM and cores. But i think i'd rather have it all in the host system.

At the moment, my guess is 80k credit a day. Though anyone who is crunching with an AMD A8-6600K APU might be able to tell me better.

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Message 19755 - Posted: 2 Aug 2014, 21:57:43 UTC

You cannot use virtual box to run GPU apps. On windows the order of driver install matters so if only one is seen after installing the ad driver then reinstall the nvidia afterwards. I think Linux is the same.

Profile eXtreme Warhead
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Message 20150 - Posted: 23 Dec 2014, 16:47:47 UTC
Last modified: 23 Dec 2014, 16:48:53 UTC

with the right os it's not a problem to run both driver. look at my profile and you can see a 660ti and a hd5850 runs on the same win7...for linux you should google this, because i think it's possible there, too

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Message 20151 - Posted: 23 Dec 2014, 18:07:55 UTC - in response to Message 20150.

with the right os it's not a problem to run both driver. look at my profile and you can see a 660ti and a hd5850 runs on the same win7...for linux you should google this, because i think it's possible there, too


Unfortunately not, Linux only supports one video driver currently.

Win 7 is the best way to run AMD/NVIDIA together.
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RFGuy_KCCO
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Message 20162 - Posted: 7 Jan 2015, 21:46:58 UTC

I have an AMD 7870 and an Nvidia 780ti humming along nicely in the box I am currently typing this on, which runs Windows 8.1. No issues whatsoever.
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Profile Stephen Uitti
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Message 20336 - Posted: 13 Mar 2015, 22:35:35 UTC

I had to reload the OS (Mint 13 - an Ubuntu derivative) on the AMD A8-6600K. I disabled the Nvidia card, and did not install the Nvidia driver. I installed AMD's APU (GPU on the chip) driver. It does great video. On BOINC startup, i get:

28-Feb-2015 10:30:49 [---] cc_config.xml not found - using defaults
28-Feb-2015 10:30:49 [---] Starting BOINC client version 7.2.42 for x86_64-pc-linux-gnu
28-Feb-2015 10:30:49 [---] log flags: file_xfer, sched_ops, task
28-Feb-2015 10:30:49 [---] Libraries: libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
28-Feb-2015 10:30:49 [---] Data directory: /u/suitti/BOINC
28-Feb-2015 10:30:49 [---] CAL: ATI GPU 0: AMD Radeon HD 7500/7600/8500/8600 series (Devastator) (CAL version 1.4.1848, 768MB, 692MB available, 1080 GFLOPS peak)
28-Feb-2015 10:30:49 [---] Creating new client state file
28-Feb-2015 10:30:49 [---] Host name: pensar
28-Feb-2015 10:30:49 [---] Processor: 4 AuthenticAMD AMD A8-6600K APU with Radeon(tm) HD Graphics [Family 21 Model 19 Stepping 1]
28-Feb-2015 10:30:49 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce tbm topoext perfctr_core arat cpb npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold bmi1
28-Feb-2015 10:30:49 [---] OS: Linux: 3.2.0-23-generic
28-Feb-2015 10:30:49 [---] Memory: 7.00 GB physical, 3.91 GB virtual
28-Feb-2015 10:30:49 [---] Disk: 435.38 GB total, 233.71 GB free

...which shows that it sees the APU. But it doesn't seem to want to crunch units on it (Collatz or otherwise). Has anyone gotten the AMD APU running at all under Linux? If so, is there some sort of hint?

My son has an AMD A10 6800K under Windows 10 (his choice), and it gets 40k to 60k units a day with Collatz. I'm expecting less from my A8, should i get it working. If i have to pick just one, i'll go with the 80k/day Nvidia. Even if i can't get the APU to work with the Nvidia GPU under Linux, i could possibly run the Nvidia card on another box, if i could get the APU crunching under Linux.

Dirk Broer
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Message 20454 - Posted: 17 May 2015, 8:55:52 UTC - in response to Message 20336.

You miss the OpenCL drivers which would be need to crunch Collatz on a card of that generation. You may need to install a proprietary driver dowloaded form the AMD website. I run the OpenCL app on both my HD 6670 -discrete card- and my HD 6550D -IGP video of my A8-3820-. The Ati app gets trashed however.

I also see a missing -or being not at the right place cc_config.xml, the file that should contain the line
<use_all_gpus>0|1</use_all_gpus>
in your case, as you do not use the primary card that is in the PCIe slot -the nVidia card.
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