[Bug 67178] New: discrete radeon HD 6400M/7400M intense heating even though it's "off"

[Bug 67178] New: discrete radeon HD 6400M/7400M intense heating even though it's "off"

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=67178

          Priority: medium
            Bug ID: 67178
          Assignee: dri-devel@lists.freedesktop.org
           Summary: discrete radeon HD 6400M/7400M intense heating even
                    though it's "off"
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tpo_deb@sourcepole.ch
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

kernel 3.11-rc1 (also tested with 3.10 from Debian, 3.7, 3,2)

# lspci -vnnn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd
  Generation Core Processor Family Integrated Graphics Controller
  [8086:0116] (rev 09) (prog-if 00 [VGA controller])
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
  [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760] (rev ff)
  (prog-if ff)

This is a HP Pavillon dv7 6130ez

Sometimes, at random, the radeon card goes into full heat production mode. This
seems to occur a while (a few minutes?) after wakeup from resume, however I'm
not sure about that. Suspending and resuming the laptop a few times (1 <= x <=
~4) seems to calm the card down again.

Power consumption according to powertop goes from ~14W up to ~50W. This happens
even though the card should be in theory switched off. Aka:

  # cat /sys/kernel/debug/vgaswitcheroo/switch
  0:IGD:+:Pwr:0000:00:02.0
  1:DIS: :Off:0000:01:00.0

  # echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
  # echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

doesn't seem to have no effect whatsoever.

It *seems* that setting "radeon.dpm=1" kernel boot options and then:

  # echo "battery" > /sys/class/drm/card$no/device/power_dpm_state

puts the card in an "active" but "relatively low" power consumption mode. It is
then using about 20W (instead of the "normal" ~14W) so it's continuously faning
out slightly warm air. And it "seems that when the card is running in this
mode, then it won't get so often, or ever (I'm not very sure) into the berserk
heating mode.

The lowest observed power consumption of the laptop is ~7W. It'd be very nice
if it'd be possible to shut the card down electrically via software and stay in
this 7W mode.

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[Bug 67178] discrete radeon HD 6400M/7400M intense heating even though it's "off"

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=67178

--- Comment #1 from Tomas Pospisek <tpo_deb@sourcepole.ch> ---
Created attachment 82828
  --> https://bugs.freedesktop.org/attachment.cgi?id=82828&action=edit
dmesg

dmesg with wlan stuff edited out

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[Bug 67178] discrete radeon HD 6400M/7400M intense heating even though it's "off"

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=67178

--- Comment #2 from Tomas Pospisek <tpo_deb@sourcepole.ch> ---
So if I boot with "radeon.dpm=1" then, as allready described, the laptop uses
"relatively little" power, and is faning off some heat continuously, even when
I set:

  # echo "battery" > /sys/class/drm/card1/device/power_dpm_state

Whether I do the following does *not* seem to matter:

  # echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
  # echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

But if I boot *without* "radeon.dpm=1" then the laptop will stay cool without
fans running out of the box using around 14W.

The various settings will show this then:

  # cat /sys/class/drm/card1/device/power_method
  dpm
  # cat /sys/class/drm/card1/device/power_profile
  default
  # cat /sys/class/drm/card1/device/power_dpm_state
  balanced

Weird that power_method would show "dpm" even though I have booted *without*
"radeon.dpm=1" ?!

When I then set:

  # echo "battery" > /sys/class/drm/card1/device/power_dpm_state

Power consumption will drop even further to ~11W.

The overal logic of all of this is evidently completely escaping me... 8-o

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[Bug 67178] discrete radeon HD 6400M/7400M intense heating even though it's "off"

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=67178

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

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

--- Comment #3 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
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/358.

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