<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Feb 1, 2014 at 9:45 AM, Christian Stöveken <span dir="ltr"><<a href="mailto:christian.stoeveken@gmail.com" target="_blank">christian.stoeveken@gmail.com</a>></span> wrote:<br>
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<div><div><div class="gmail_extra"><div class="gmail_quote">On Fri, Jan 31, 2014 at 11:25 AM, Dave Airlie <span dir="ltr"><<a href="mailto:airlied@gmail.com" target="_blank">airlied@gmail.com</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
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</div></div>You'll probably run out of PCI address space with too many cards,<br>
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Dave.<br>
</blockquote></div><br></div></div></div></div><div class="gmail_extra">That could possibly happen - I don't know how to check though.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Looks like the ID's are fine to me.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Could CONFIG_VGA_ARB_MAX_GPUS (is set to 16) be the problem?</div></div></div></div></blockquote><div><br></div><div>This problem happens way before the kernel starts. When the bios sets up the pci resource space, you have something between 512M and 2GB available for pci resources (this depends on the bios). Each card will usually eat 128M or 256M of pci resource space (although it depends on the cards) so it's possible to run out. When that happens, some bioses won't boot, others will just disable some devices. You can look for that info in your kernel logs, the e820 area size is printed (look for something like e820: [mem 0xd0000000-0xffefffff] available for PCI devices). You can use lspci -v to check if all the cards come up with their pci resources and how things fit in there. If all of them have a pci resource then you're fine on that front.</div>
<div><br></div><div>Stéphane<br></div><div><br></div></div></div></div>