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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Hang during boot when DPM is on (R9 270X)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76490#c71">Comment # 71</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Hang during boot when DPM is on (R9 270X)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76490">bug 76490</a>
from <span class="vcard"><a class="email" href="mailto:mrader3940@gmail.com" title="Maxim Sheviakov <mrader3940@gmail.com>"> <span class="fn">Maxim Sheviakov</span></a>
</span></b>
<pre>(In reply to Tobias Droste from <a href="show_bug.cgi?id=76490#c70">comment #70</a>)
<span class="quote">> (In reply to Benjamin Bellec from <a href="show_bug.cgi?id=76490#c68">comment #68</a>)
> > If I have to read the VBIOS and add I quirk in the kernel, why the kernel
> > can't do this by himself ?
> >
> > Moreover, I saw the previous quirk in the kernel, the max memory clock is
> > often set to "120000". I guess it stands for 1.2GHz QDR which is equivalent
> > to 4.8GHz. My card, like all the R7 370 are supposed to work at 5.6GHz so
> > this is a serious lost of performance.
> >
> > At the moment I will just return my card.
>
> For the record:
>
> This stuff *can't* be read from the VBIOS and has to be found by trial and
> error.
> You also don't have to google the steps, they are described in <a href="show_bug.cgi?id=76490#c48">comment #48</a>.
>
> But otherwise you are right, It will limit your card and replacing it with
> another one seems like the only option you have right now. At least that's
> what I did too, because I don't see this bug fixed in the near future.</span >
Hmm, nice point. By the way, is the MCLK kinda divided by four? So, if Memory
Clock is 5600MHz, I'll have to do 5600/4*10000 to get the correct value? It's
like, 120000 value = 1.2GHz*4 = Original frequency = 4800MHz, right? If that's
it, I'll fix my quirk (AGAIN, LOL) and try using 970MHz and 5600MHz written as
needed, 'cause my GPU is MSI R7 370 Armor 2X, and looks like values in quirk
are *kinda* low for it.</pre>
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