[Bug 110865] Rx480 consumes 20w more power in idle than under Windows

[Bug 110865] Rx480 consumes 20w more power in idle than under Windows

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

            Bug ID: 110865
           Summary: Rx480 consumes 20w more power in idle than under
                    Windows
           Product: Mesa
           Version: 19.1
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mwolf@adiumentum.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 144485
  --> https://bugs.freedesktop.org/attachment.cgi?id=144485&action=edit
logfiles as requested in the amd bugreport guide

First I am not sure where to file that bug, so please be gentle with me, if I
selected the wrong component.

I noticed for a while higher temperatures of my Videocard when my pc was just
idling with gnome. Then I dug deeper and found out that my "zero fan" videocard
does not stop the fan when I run Linux.

So I ran this line here:
watch -n 0.5 cat /sys/kernel/debug/dri/0/amdgpu_pm_info
and it showed me that the MCLK does not clock down to 300MHz as it does with
Windows 10. 
GFX Clocks and Power:
        2000 MHz (MCLK)
        300 MHz (SCLK)
        300 MHz (PSTATE_SCLK)
        300 MHz (PSTATE_MCLK)
        1000 mV (VDDGFX)
        24.75 W (average GPU)

GPU Temperature: 45 C
GPU Load: 0 %

I have a multimonitor setup with two 1920x1200 pixel screens. When I use
Windows 10, the MCLK does not go beyond 300MHz when the desktop is idling.
(measured with hwmonitor) 
When I power-off one screen under linux the (average GPU) goes down to 8-10W
and the MCLK drops to 300MHz, so the card can clock down, but is somehow
prohibited by the driver or configuration?

I followed this bug report guide from amd:
https://www.amd.com/en/support/kb/faq/amdgpu-installation#faq-Reporting-Bugs
and attached several logfiles.

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[Bug 110865] Rx480 consumes 20w more power in idle than under Windows

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

Timothy Arceri <t_arceri@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|19.1                        |DRI git
            Product|Mesa                        |DRI
         QA Contact|dri-devel@lists.freedesktop |
                   |.org                        |
          Component|Drivers/Gallium/radeonsi    |DRM/AMDgpu

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #1 from Martin <mwolf@adiumentum.com> ---
My bug is now two months old, do you need more information, or what can I do to
get your attention?

I think this is a serious issue, because it seems to affect a lot, maybe even
all polaris cards. (tested two more in the last weeks).

Shouldn't it be a priority to stop the waste of so much energy?

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
This is the expected behavior for multiple monitors on Linux.  mclk switching
must happen in the monitors' blanking period.  Since they likely don't align,
especially if the monitors have different timing, we have to use a fixed mclk. 
The DC modesetting code can lock the timing of multiple monitors if they are
using the exact same timing so that the blanking periods align, but I don't
think the Linux power management code takes this into account at the moment.

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--- Comment #3 from Martin <mwolf@adiumentum.com> ---
Thank you for your explanation.
How do I find out the blanking periods?

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--- Comment #4 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Martin from comment #3)
> Thank you for your explanation.
> How do I find out the blanking periods?

They are based on the timing for the mode on the display.  As for the relevant
driver code, take a look at smu7_apply_state_adjust_rules().

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 144978
  --> https://bugs.freedesktop.org/attachment.cgi?id=144978&action=edit
possible fix

Does this patch fix the issue?

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #6 from Martin <mwolf@adiumentum.com> ---
Sadly it did not help.
the MCLK is still fixed at 2000MHz.

How can I verify that I did everything correctly?
I just rebuilt Kernel 5.2.6 from Fedoras srpm and added the patch in the spec
file.

Or could it be that I have two different 1920x1200 screens? one from HP and one
from Dell?

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[Bug 110865] Rx480 consumes 20w more power in idle than under Windows

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #7 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Martin from comment #6)
> Sadly it did not help.
> the MCLK is still fixed at 2000MHz.
> 
> How can I verify that I did everything correctly?

You can add a printk to the patch to verify that it's being applied.  Maybe
print the value of hwmgr->display_config->multi_monitor_in_sync to see if the
monitors are synced or not.

> I just rebuilt Kernel 5.2.6 from Fedoras srpm and added the patch in the
> spec file.
> 
> Or could it be that I have two different 1920x1200 screens? one from HP and
> one from Dell?

That is likely the issue.  If the timings for the displays are slightly
different, they won't be synced.  It could also be that the DC code doesn't set
the multi_monitor_in_sync flag properly.

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--- Comment #8 from Alex Deucher <alexdeucher@gmail.com> ---
looks like the DC code does not set up the multi_monitor_in_sync flag properly.

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--- Comment #9 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 144983
  --> https://bugs.freedesktop.org/attachment.cgi?id=144983&action=edit
fix DC code

Can you try applying both of these patches?  Assuming both of your monitors
have the same timing this might work.

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--- Comment #10 from Martin <mwolf@adiumentum.com> ---
Sorry for the delay, I had to figure out which kernel to use, because only
Kernel 5.3.0-rc3 accepts your second patch. Stable 5.2.6 and .7 generate errors
at :25
In about 2 hours I will have it built. 
You don't have a spare Ryzen 9 3900X for me to speed it up? Kernel building
shows me quite drastically that my Haswell I7 is out of date ;)

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

--- Comment #11 from Martin <mwolf@adiumentum.com> ---
Kernel 5.3.0-rc3 does not boot on my system
It hangs at detecting the discs.

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--- Comment #12 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Alex Deucher from comment #9)
> Created attachment 144983 [details] [review]
> fix DC code
> 
> Can you try applying both of these patches?  Assuming both of your monitors
> have the same timing this might work.

Didn't apply on amd-staging-drm-next, too.

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--- Comment #13 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Dieter Nützel from comment #12)
> (In reply to Alex Deucher from comment #9)
> > Created attachment 144983 [details] [review] [review]
> > fix DC code
> > 
> > Can you try applying both of these patches?  Assuming both of your monitors
> > have the same timing this might work.
> 
> Didn't apply on amd-staging-drm-next, too.

BTW

Alex, is this the same problem?
My card never was below ~32 W (even with single monitor
but I have two identical HDMI 1920x1080)
PSTATE_xxxx is much higher than Martin's
didn't saw "zero fan" / zero core (no spinning fans)

Polaris 20 / 8GB Sapphire Radeon RX 580 Nitro+
single monitor

GFX Clocks and Power:
        300 MHz (MCLK)
        300 MHz (SCLK)
        600 MHz (PSTATE_SCLK)
        1000 MHz (PSTATE_MCLK)
        750 mV (VDDGFX)
        32.17 W (average GPU)

GPU Temperature: 31 C
GPU Load: 0 %

amdgpu-pci-0100
Adapter: PCI adapter
vddgfx:       +0.75 V  
fan1:         909 RPM  (min =    0 RPM, max = 3200 RPM)
temp1:        +30.0°C  (crit = +94.0°C, hyst = -273.1°C)
power1:       32.09 W  (cap = 175.00 W)

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--- Comment #14 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Dieter Nützel from comment #13)
> 
> Alex, is this the same problem?

No.

> 
> GFX Clocks and Power:
>         300 MHz (MCLK)
>         300 MHz (SCLK)

Your mclk is going to a lower state when it's idle.

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--- Comment #15 from Martin <mwolf@adiumentum.com> ---
Finally with rc5 of Kernel 5.3 I was able to boot the kernel, sadly your two
patches did not lower the power consumption.

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https://bugs.freedesktop.org/show_bug.cgi?id=110865

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #144983|0                           |1
        is obsolete|                            |

--- Comment #16 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 145136
  --> https://bugs.freedesktop.org/attachment.cgi?id=145136&action=edit
fix DC code

Can you try this patch along with attachment 144978?

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--- Comment #17 from Alex Deucher <alexdeucher@gmail.com> ---
Note that it will only work if your monitors have identical timing.

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--- Comment #18 from Martin <mwolf@adiumentum.com> ---
Hello,

sorry that it took me that long. I was on a historic cycling event in Germany.

Your patch indeed did something.
The power consumption drops sometimes to 70W, but now both screen flicker and
produce errors similar to a dying video-memory.

GFX Clocks and Power:
        300 MHz (MCLK)
        308 MHz (SCLK)
        300 MHz (PSTATE_SCLK)
        300 MHz (PSTATE_MCLK)
        800 mV (VDDGFX)
        12.222 W (average GPU)

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--- Comment #19 from Martin <mwolf@adiumentum.com> ---
with 70W i mean total system power-consumption of course. 
This is roughly the same / a little more as with Windows. So we are on a good
path I think.

If i do 
"echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level"
the flickering stops.
So the flickering is caused by the automatic powermanagement / reclocking.

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Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #145136|0                           |1
        is obsolete|                            |

--- Comment #20 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 145157
  --> https://bugs.freedesktop.org/attachment.cgi?id=145157&action=edit
fix DC code

Updated patch.

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--- Comment #21 from Martin <mwolf@adiumentum.com> ---
sadly the screen still flickers

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--- Comment #22 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
Hello Alex and Martin,

I've tried both on my

Polaris 20, RX580 8 GB Sapphire Technology Limited Nitro+ Radeon RX 580

- v2 patched into amd-staging-drm-next (before inclusion of v3)
- v3 with amd-staging-drm-next
https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-drm-next&id=ca82748783d8189a54a85f2ea1c2710182ba6138

Both flicker with green/black (?) horizontally lines over both screens.
Mostly during power level switch. For example during mouse movement/interaction
(wheel) and mouse pointer traverse from konsole/etc. to desktop (KDE5 Plasma
5.xx, here).

UVD load (mplayer etc.) is not enough to fix it.
E.g. radv (vkcube) not.

But other gfx load (vkmark/glmark2, etc.).
When there is lower gfx demand during the above tests (glmark2 -b buffer) the
flicker came up, again.

Martin's observation

[-]
If i do 
"echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level"
the flickering stops.
So the flickering is caused by the automatic powermanagement / reclocking.
[-]

Works here, too (tested with v3).

But I never could go below ~32 W !!!
Tested with both Nitro+ BIOS modes.

The PSTATE_xxxx wouldn't change on my card. They stay @ 600/1000 all the time!?

GFX Clocks and Power:
        300 MHz (MCLK)
        300 MHz (SCLK)
        600 MHz (PSTATE_SCLK)
        1000 MHz (PSTATE_MCLK)
        750 mV (VDDGFX)
        32.76 W (average GPU)

GPU Temperature: 31 C
GPU Load: 0 %
MEM Load: 3 %

Any hints?

And sorry for my bad English this time - my best friend from beginning of
German Gymnasium died after 6 years of fight against cancer. He aged only 52.
Leaving a wife and two little girls...

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--- Comment #23 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
Oh, BTW Martin which type are your 2 identical displays? HDMI (like mine) or
DisplayPort?

I use sound over HDMI, too. And only one display present it.

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--- Comment #24 from Martin <mwolf@adiumentum.com> ---
I am so sorry to hear that Dieter, this is really terrible.
But I can assure you your English is fine. 

I also think your problem is somewhere else. You mentioned it yourself. and I
think Alex Deucher did as well, that your P-States are not changing.

I have two different screens. One HP ZR2440W connected via DVI and a Dell
U2412M connected via Displayport. Both run at 59.95Hz@1920x1200

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--- Comment #25 from Alex Deucher <alexdeucher@gmail.com> ---
The patches I posted only affect multiple monitors with identical timing.  That
means identical modelines, not just the same resolution and refresh rate.  In
practice this generally means you need to use identical monitors.  If you are
using a single monitor or multiple different monitors, the patches are not
relevant for you.

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--- Comment #26 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
Created attachment 145180
  --> https://bugs.freedesktop.org/attachment.cgi?id=145180&action=edit
xrandr -q

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--- Comment #27 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
This is going nuts...

Martins has

2 different displays (both 59.95Hz@1920x1200),
RX 480 and _very nice_ numbers (only 12.222 W), now

GFX Clocks and Power:
        300 MHz (MCLK)                     <= !!!
        308 MHz (SCLK)
        300 MHz (PSTATE_SCLK)
        300 MHz (PSTATE_MCLK)
        800 mV (VDDGFX)                    <= !!!
        12.222 W (average GPU)

=> working (?!) but flicker

I have

2 identical displays BenQ GL2440H  (both 60.00 Hz @ 1920x1080),
RX580 and 'normal' numbers (~32 W - but to high?!), now

GFX Clocks and Power:
        300 MHz (MCLK)                     <= !!!
        300 MHz (SCLK)
        600 MHz (PSTATE_SCLK)
        1000 MHz (PSTATE_MCLK)
        750 mV (VDDGFX)                    <= !!! mine is better, but...
        32.76 W (average GPU)

=> working (?!) but flicker, too.


This
        600 MHz (PSTATE_SCLK)
        1000 MHz (PSTATE_MCLK)

must be a different problem (compare with Martin's RX 480).
I open another ticket for it.

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--- Comment #28 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
I've tried solving the flicker with both fixes (sent by magist3r) from this bug

Bug 102646 - Screen flickering under amdgpu-experimental [buggy auto power
profile]
https://bugs.freedesktop.org/show_bug.cgi?id=102646

But no success.

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--- Comment #29 from Martin <mwolf@adiumentum.com> ---
@Alex Deucher
Is there a fix for the graphical glitches I experience? 
They seem to be similar to the glitches I get when I enable overclocking with
amdgpu.ppfeaturemask=0xffffffff

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--- Comment #30 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Martin from comment #29)
> @Alex Deucher
> Is there a fix for the graphical glitches I experience? 
> They seem to be similar to the glitches I get when I enable overclocking
> with amdgpu.ppfeaturemask=0xffffffff

It would appear that the monitors don't actually quite sync up in your case
otherwise you wouldn't see the flicker.

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--- Comment #31 from Martin <mwolf@adiumentum.com> ---
well the flickering goes away, if I lock the clocks to "low" or "high"

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--- Comment #32 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Martin from comment #31)
> well the flickering goes away, if I lock the clocks to "low" or "high"

Exactly.  In that case the mclk never changes so there is no flicker.  The mclk
has to change during the vblank period otherwise you see flickering.  If the
vblank periods are not synced up across monitors, you see flickering.

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--- Comment #33 from Martin <mwolf@adiumentum.com> ---
thank you for the clarification. 
Right now I switch manually between low and high when necessary, so I can work
around the glitches. 
Do you think it will be possible to achieve feature parity with windows soon?

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--- Comment #34 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Martin from comment #33)
> thank you for the clarification. 
> Right now I switch manually between low and high when necessary, so I can
> work around the glitches. 
> Do you think it will be possible to achieve feature parity with windows soon?

I don't think windows enables mclk switching with multiple monitors either. 
It's not clear what's different between windows and Linux on your board
unfortunately.

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--- Comment #35 from Martin <mwolf@adiumentum.com> ---
Thank you for clarification, do you think there is a solution for the problem
on the linux side, since it works absolutely fine on windows.

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--- Comment #36 from tempel.julian@gmail.com ---
(In reply to Dieter Nützel from comment #28)
> I've tried solving the flicker with both fixes (sent by magist3r) from this
> bug
> 
> Bug 102646 - Screen flickering under amdgpu-experimental [buggy auto power
> profile]
> https://bugs.freedesktop.org/show_bug.cgi?id=102646
> 
> But no success.

Have you also applied Ahzo's patch, just in case?

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--- Comment #37 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to tempel.julian from comment #36)
> (In reply to Dieter Nützel from comment #28)
> > I've tried solving the flicker with both fixes (sent by magist3r) from this
> > bug
> > 
> > Bug 102646 - Screen flickering under amdgpu-experimental [buggy auto power
> > profile]
> > https://bugs.freedesktop.org/show_bug.cgi?id=102646
> > 
> > But no success.
> 
> Have you also applied Ahzo's patch, just in case?

Thanks for the hint.

v2 is already in 'amd-staging-drm-next'
f659bb6dae58c113805f92822e4c16ddd3156b79
drm/amd/powerplay/smu7: enforce minimal VBITimeout (v2)

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Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #38 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
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You can subscribe and participate further through the new bug through this link
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