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#1 2021-01-16 07:46:15

jso_8910
Member
Registered: 2021-01-16
Posts: 6

Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

Hello there! I have been on Arch Linux for a few weeks now (about a month), and I have been having high power consumption. With Discord, Telegram, a few Firefox tabs including Netflix but closing Netflix doesn't change much, and using KDE with 5 virtual desktops (3 in use), I am having a power consumption of 20.84 watts according to the energy tab of the info center and powertop. I manually started TLP though it should start automatically anyways after unplugging. I often have a consumption of 30 watts.

Some relevant information:

I am on the linux-lts kernel.

I am using bluetooth but it isn't an option to turn it off as I don't have any good wired earbuds.

My laptop has Vega 10 graphics and a Ryzen 7 Pro 3700U.

Output of lcpci:

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 IOMMU
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:01.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:01.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:01.6 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:01.7 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0]
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Internal PCIe GPP Bridge 0 to Bus A
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 7
01:00.0 Network controller: Intel Corporation Wireless-AC 9260 (rev 29)
02:00.0 Non-Volatile memory controller: SK hynix Device 1627
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0e)
03:00.1 Serial controller: Realtek Semiconductor Co., Ltd. Device 816a (rev 0e)
03:00.2 Serial controller: Realtek Semiconductor Co., Ltd. Device 816b (rev 0e)
03:00.3 IPMI Interface: Realtek Semiconductor Co., Ltd. Device 816c (rev 0e)
03:00.4 USB controller: Realtek Semiconductor Co., Ltd. Device 816d (rev 0e)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
05:00.0 SD Host controller: Genesys Logic, Inc GL9750 SD Host Controller (rev 01)
06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Picasso (rev d1)
06:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio Controller
06:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) Platform Security Processor
06:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Raven USB 3.1
06:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Raven USB 3.1
06:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] Raven/Raven2/FireFlight/Renoir Audio Processor
06:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) HD Audio Controller

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#2 2021-01-16 11:48:18

Head_on_a_Stick
Member
From: The Wirral
Registered: 2014-02-20
Posts: 9,003
Website

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

I presume you installed the linux-firmware package? How about the CPU µcode? Not sure if there are any fixes for third generation Ryzen though.

jso_8910 wrote:

I am having a power consumption of 20.84 watts according to the energy tab of the info center and powertop

What does powertop identify as the most egregious consumers?

Jin, Jîyan, Azadî

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#3 2021-01-16 14:07:05

jso_8910
Member
Registered: 2021-01-16
Posts: 6

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

Head_on_a_Stick wrote:

I presume you installed the linux-firmware package? How about the CPU µcode? Not sure if there are any fixes for third generation Ryzen though.

Yep I have for both.

Head_on_a_Stick wrote:

What does powertop identify as the most egregious consumers?

Idk what is up because in the energy section of the info center it is reporting consumption as 0.71 watts. Right now I am watching something on VLC and these are the top power consumers:

he battery reports a discharge rate of 15.5 W
The energy consumed was 0.00 J
The estimated remaining time is 3 hours, 8 minutes

Summary: 3785.7 wakeups/second,  0.0 GPU ops/seconds, 0.0 VFS ops/sec and 175.1% CPU use

Power est.              Usage       Events/s    Category       Description
  2.13 W      6.1 ms/s     536.4        Timer          tick_sched_timer
  1.48 W    266.0 ms/s     268.7        Process        [PID 2027] /tmp/.mount_jetbravJc8k0/jetbrains-toolbox-helper --type=renderer --no-sandbox --log-file=/home/jason/.local/share/J
  1.28 W    271.8 ms/s     217.5        Process        [PID 1781] /home/jason/.local/share/JetBrains/Toolbox/bin/jetbrains-toolbox --minimize
  996 mW     45.6 ms/s     224.2        Process        [PID 1352] /usr/bin/kwin_x11
  866 mW     31.5 ms/s     206.8        Process        [PID 1443] /usr/bin/pulseaudio --daemonize=no --log-target=journal
  599 mW    210.2 ms/s      68.6        Process        [PID 1770] ./jetbrains-toolbox --minimize
  501 mW     15.2 ms/s     120.8        Process        [PID 3236] /usr/bin/telegram-desktop --
  480 mW     21.0 ms/s     106.3        Process        [PID 1013] /usr/lib/Xorg -nolisten tcp -background none -seat seat0 vt1 -auth /var/run/sddm/{328885eb-88c5-4f4d-8e8a-040032712d
  445 mW      6.6 ms/s     110.2        Process        [PID 183398] /usr/bin/vlc --started-from-file /home/jason/Downloads/WandaVision.S01E02.720p.x265-ZMNT/WandaVision.S01E02.720p.x
  444 mW     11.6 ms/s     103.4        Process        [PID 3397] /opt/discord/Discord --type=renderer --autoplay-policy=no-user-gesture-required --field-trial-handle=135288192126480

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#4 2021-01-17 10:55:32

Head_on_a_Stick
Member
From: The Wirral
Registered: 2014-02-20
Posts: 9,003
Website

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

Can you confirm the actual power consumption with physical measurement? The software might be wrong.

Jin, Jîyan, Azadî

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#5 2021-01-17 11:01:28

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 25,351

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

I'd also not expect this to be out of the ordinary if you are actively watching a video. What's the consumption while "idle"?  What consumption do you expect with the workload you are generating? I.e. do you have any other points of reference that this should be lower?

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#6 2021-01-17 15:24:09

jso_8910
Member
Registered: 2021-01-16
Posts: 6

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

Head_on_a_Stick wrote:

Can you confirm the actual power consumption with physical measurement? The software might be wrong.

Not sure exactly how to do that but the answer is most likely no.

V1del wrote:

I'd also not expect this to be out of the ordinary if you are actively watching a video. What's the consumption while "idle"?  What consumption do you expect with the workload you are generating? I.e. do you have any other points of reference that this should be lower?

Closed the video tab and consumption is still at around 20 watts. The advertised battery life on Windows is far higher than this, and I had the impression you could get close to Windows battery.

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#7 2021-01-17 15:27:23

Head_on_a_Stick
Member
From: The Wirral
Registered: 2014-02-20
Posts: 9,003
Website

Re: Power consumption of Thinkpad T495 with KDE upwards of 20W constantly

jso_8910 wrote:

The advertised battery life on Windows is far higher than this, and I had the impression you could get close to Windows battery.

I have an E485 and the advertised battery life on Windows for that is complete bollocks. I get about the same battery life under Windows, GNU/Linux and OpenBSD but none of them are anywhere near the claims.

Jin, Jîyan, Azadî

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