Turns out this is going to be really hard. It requires change in both
PCI and HDA, and potentially in nouveau and proprietary nvidia driver.
I'll revisit this once upstream devs have a concrete plan.
** Changed in: linux (Ubuntu)
Status: In Progress => Confirmed
** Changed in: linux
Those errors aren't printed when booting with hdmi connected. Attached
related dmesg output. Device `01:00.1` is suspended.
I can confirm from documentation about this laptop (Acer aspire
A715-71G) that the embedded display is connected to the intel GPU (eDP)
and the HDMI port is connected to the
Does this happen when boot with HDMI/DP connected?
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https://bugs.launchpad.net/bugs/1907212
Title:
Power consumption regression after upgrade to 20.10 5.8.0-31-generic
To manage
https://lkml.org/lkml/2020/12/16/347
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Title:
Power consumption regression after upgrade to 20.10 5.8.0-31-generic
To manage notifications about
5.8.0-35-generic #37~lp1907212+4
Nvidia gpu successfully powered down.
$ cat /sys/bus/pci/devices/:01:00.1/power/runtime_status
suspended
The previous snd_hda_intel error messages aren't printed anymore, yet
"snd_hda_intel :01:00.1: can't change power state from D3cold to D0
(config space
Thanks. Please bear with me and test this one:
https://people.canonical.com/~khfeng/lp1907212+4/
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Title:
Power consumption regression after
With this one 5.8.0-35-generic #37~lp1907212+3, nvidia gpu isn't powered down:
$ cat /sys/bus/pci/devices/:01:00.1/power/runtime_status
active
$ cat /sys/bus/pci/devices/:01:00.1/power/control
auto
At ~242 there are also snd_hda_intel errors on attached dmesg, which are later
reprinted
Can you please give this a try:
https://people.canonical.com/~khfeng/lp1907212/3/
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Title:
Power consumption regression after upgrade to 20.10
https://lkml.org/lkml/2020/12/14/25
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Title:
Power consumption regression after upgrade to 20.10 5.8.0-31-generic
To manage notifications about
With this kernel 5.8.0-35-generic #37~lp1907212+2 nvidia gpu is
successfully powered down, and idle power consumption was normal at 5-6
watt.
$ cat /sys/bus/pci/devices/:01:00.1/power/runtime_status
suspended
$ cat /sys/bus/pci/devices/:01:00.1/power/control
auto
On dmesg output there
Ok, please test this one:
https://people.canonical.com/~khfeng/lp1907212/2/
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Title:
Power consumption regression after upgrade to 20.10
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Kai-Heng Feng (kaihengfeng)
** Changed in: linux (Ubuntu)
Status: Incomplete => In Progress
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$ cat /sys/bus/pci/devices/:01:00.1/power/runtime_status
active
$ cat /sys/bus/pci/devices/:01:00.1/power/control
auto
They are the same with both 5.8.0-31-generic and 5.8.0-35-generic from
https://people.canonical.com/~khfeng/lp1907212/
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What's the "runtime_status" and "control" of device :01:00.1?
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Title:
Power consumption regression after upgrade to 20.10 5.8.0-31-generic
Dmesg after booting with provided kernel
https://people.canonical.com/~khfeng/lp1907212/
High power consumption remains, `echo :01:00.1 | sudo tee
/sys/module/snd_hda_intel/drivers/pci:snd_hda_intel/unbind` works.
** Attachment added: "dmesg_5.8.0-35-generic.txt"
Can you please test this kernel:
https://people.canonical.com/~khfeng/lp1907212/
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Title:
Power consumption regression after upgrade to 20.10
$ uname -r
5.10.0-051000rc6-generic
Dmesg attached after booting with intel gpu and 5.10, high power consumption
remains, again
`echo :01:00.1 | sudo tee
/sys/module/snd_hda_intel/drivers/pci:snd_hda_intel/unbind` works.
** Attachment added:
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.10-rc6/amd64/
And attach dmesg here.
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Title:
Power
It was certainly working with 5.4.0-* from 20.04 at some time, I have
been mainly using dGPU for 2-3 months, and wouldn't have noticed any
regressions.
Strangely, I tested with 5.4.0-56-generic that remained after the
upgrade, and it is also not powering down dGPU.
20.10 didn't upgrade nvidia
What was the last working version?
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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Title:
Power consumption regression
This error on dmesg is relevant `snd_hda_intel :01:00.1: can't
change power state from D3cold to D0 (config space inaccessible)`, if I
unbind the nvidia audio device function with `echo :01:00.1 >
/sys/module/snd_hda_intel/drivers/pci:snd_hda_intel/unbind` power
consumption returns to
** Summary changed:
- Power consumption regression after ugrade to 20.10 5.8.0-31-generic
+ Power consumption regression after upgrade to 20.10 5.8.0-31-generic
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