From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 91861] [Radeon RS780] Blank screen (no signal) on HDMI after boot in 3.15 & later
Date: Fri, 06 Feb 2015 09:44:11 +0000 [thread overview]
Message-ID: <bug-91861-2300-ASdsNxS8t6@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-91861-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=91861
--- Comment #14 from Christian König <deathsimple@vodafone.de> ---
(In reply to Mike S. from comment #13)
> So, from your explanation, using a ref_div of 7 compared to 2, means that
> the VCO is running at a higher frequency, and hence, higher voltage. So I
> assume that would mean the GPU would be drawing more power & therefore run
> hotter, though I am not sure how significant this is to its overall power
> use.
>
> Is that right?
No, just the other way around. A higher reference divider results in a lower
post divider and a lower feedback divider and that in turn results in a lower
voltage and lower power consumption.
But the over all power consumption of a PLL compared to the whole system or
even the GFX block is completely neglitable. I would guess something between a
1/1000000 and 1/100000 of a Watt compared to a couple of Watt for the whole
system.
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next prev parent reply other threads:[~2015-02-06 9:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-23 7:29 [Bug 91861] New: [Radeon RS780] Blank screen (no signal) on HDMI after boot in 3.15 & later bugzilla-daemon
2015-01-23 7:35 ` [Bug 91861] " bugzilla-daemon
2015-01-23 19:15 ` bugzilla-daemon
2015-01-24 11:05 ` bugzilla-daemon
2015-01-27 8:08 ` bugzilla-daemon
2015-01-27 9:15 ` bugzilla-daemon
2015-01-28 23:46 ` bugzilla-daemon
2015-01-29 13:00 ` bugzilla-daemon
2015-01-29 22:20 ` bugzilla-daemon
2015-01-30 1:21 ` bugzilla-daemon
2015-01-30 15:43 ` bugzilla-daemon
2015-01-30 22:44 ` bugzilla-daemon
2015-01-31 9:55 ` bugzilla-daemon
2015-02-01 22:19 ` bugzilla-daemon
2015-02-06 9:44 ` bugzilla-daemon [this message]
2015-02-06 9:52 ` bugzilla-daemon
2015-02-06 10:08 ` bugzilla-daemon
2015-02-06 10:20 ` bugzilla-daemon
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