Comme=
nt # 12
on bug 11148=
2
from Robert
Andrew, you're my hero ;-) While I'm even more sad now (becaus=
e I now think
that this issue will be indeed never be fixed) I now at least can imagine
what's going on.
As you recommended I changed resolution to 1920x1080. That's quite common I
would say. And tata! Indeed "sensors" reported 8W. Then I changed=
to 3840x2160.
Not so usual I guess but the 2nd biggest resolution my monitor supports. St=
ill
8W! And then back to 5120x1440. And tata! 33W :-(
That could mean two things: 1) There is a bug somewhere (firmware, driver, =
...)
with this resolution which causes that high idle power consumption or 2) wh=
ich
is even worse I suspect that with this resolution the 5700XT acts like you =
have
plugged in two monitors. And from what I read throughout all Navi10 reviews
multi monitor setups and power consumption was and still is a problem with =
AMD
graphic cards in general. Oh man, that's something I really didn't calculat=
ed
with :-( Yeah, in that case I can really only hope for the Intel Xe graphics
cards next year (if they really build a consumer card which nobody knows yet
;-) ).
I still don't understand why in console where KMS is enabled 8W is enough a=
nd
while running KDE Plasma in that resolution it takes round about 33W. But m=
aybe
it really has something to do with acceleration. It doesn't even consider
reducing memory clock at least a little bit even if I do nothing and haven't
even started any program. That's the funny thing in general: As long as I d=
on't
start Firefox, Thunderbird or something like that "sensors" don't=
even work. It
just prints garbage values and takes minutes to complete. If I start one of=
the
programs mentioned above the screen flickers very shortly and afterwards
"sensors" works as expected. I guess only the AMD god knows what =
that means ;-)=20
At least I now know that I can't do anything further. It just would be cool=
if
one of the AMD engineers could confirm my assumption that with a resolution=
of
5144x1440 the card always runs at highest memory clock speed as it does wit=
h a
multi monitor setup (from what I've read so far).