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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - bfgminer --scrypt on 7xxx+"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72785#c39">Comment # 39</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - bfgminer --scrypt on 7xxx+"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72785">bug 72785</a>
from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
<pre>(In reply to Linux User from <a href="show_bug.cgi?id=72785#c36">comment #36</a>)
<span class="quote">> P.P.S. and what about better fan/intensity control?</span >
See <a class="bz_bug_link
bz_status_NEW "
title="NEW - Fan speed in idle at 40% with radeonsi and at 18% with catalyst"
href="show_bug.cgi?id=73338">bug 73338</a>.
(In reply to Linux User from <a href="show_bug.cgi?id=72785#c38">comment #38</a>)
<span class="quote">> P.S. also there is another silly issue. If I just install Ubuntu and run
> bfgminer on multi-GPU setup within X session, it would only see 1st GPU
> (where X server running). Remaining GPUs are not detected. Fix is to either
> run bfgminer as root (extremely unsafe!!!) or create new user and make
> "video" it's primary group. The user who installs Ubuntu is a member of
> "video" group, but "video" is his secondary group, which is very common.
> Somehow, kernel seems to disregard permissions in such case and would issue
> -EPERM on certain syscall, making bfgminer unable to find GPUs except one
> used by X. Generally it means that user can't use more than 1 GPU unless he
> is either root (very dangerous!) or video is his primary group (inconvenient
> and uncommon). I believe it is a bug and I should file it? Since I fail to
> understand how average Joe would be able to use some OpenCL program in
> multi-GPU setup and get it working "by default" on all available GPUs. I
> guess I should file it as new bug? Is it kernel issue or MESA, etc?</span >
You should report this to Ubuntu.</pre>
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