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Bug#990162: marked as done (power consumption regression)

Your message dated Thu, 20 Feb 2025 13:40:02 +0100 (CET)
with message-id <20250220124002.4C410BE2EE7@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #990162,
regarding power consumption regression
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
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immediately.)


-- 
990162: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990162
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-5.10.0-6-amd64
Version: 5.10.28-1
Idle power consumption has increased by 25% from Debian 10.9 to Debian 11.
Possibly a kernel or driver/firmware issue.

Debian 11, updated
# uname -a
Linux mx1 5.10.0-6-amd64 #1 SMP Debian 5.10.28-1 (2021-04-09) x86_64 GNU/Linux

dpkg --list | grep linux-image
ii  linux-image-5.10.0-6-amd64     5.10.28-1                      amd64        Linux 5.10 for 64-bit PCs (signed)
ii  linux-image-amd64              5.10.28-1                      amd64        Linux for 64-bit PCs (meta-package)

powertop --auto-tune was executed (tunables at good)
see below for C states output

dpkg --list | grep powertop
ii  powertop                       2.11-1                         amd64        diagnose issues with power consumption and management

processor: Coffee Lake Intel Pentium G5400

One error in dmesg
dmesg: all i915 lines:
[    2.153980] i915 0000:00:02.0: [drm] VT-d active for gfx access
[    2.158236] i915 0000:00:02.0: vgaarb: deactivate vga console
[    2.172255] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.174543] i915 0000:00:02.0: firmware: failed to load i915/kbl_dmc_ver1_04.bin (-2)
[    2.174551] i915 0000:00:02.0: Direct firmware load for i915/kbl_dmc_ver1_04.bin failed with error -2
[    2.174553] i915 0000:00:02.0: [drm] Failed to load DMC firmware i915/kbl_dmc_ver1_04.bin. Disabling runtime power management.
[    2.174554] i915 0000:00:02.0: [drm] DMC firmware homepage: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915
[    2.515706] i915 0000:00:02.0: [drm] failed to retrieve link info, disabling eDP
[    2.556098] [drm] Initialized i915 1.6.0 20200917 for 0000:00:02.0 on minor 0
[    2.558481] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[    2.608536] fbcon: i915drmfb (fb0) is primary device
[    2.647236] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device

# lspci | grep -i VGA
00:02.0 VGA compatible controller: Intel Corporation CoffeeLake-S GT1 [UHD Graphics 610]

kbl_dmc_ver1_04.bin not found on disk
# find / -name kbl_dmc_ver1_04.bin

# cat /sys/kernel/debug/dri/0/i915_dmc_info
cat /sys/kernel/debug/dri/0/i915_dmc_info
fw loaded: no
path: i915/kbl_dmc_ver1_04.bin
[..]
# cat /sys/kernel/debug/dri/0/i915_params/dmc_firmware_path
cat /sys/kernel/debug/dri/0/i915_params/dmc_firmware_path
(null)

No GUI.

/usr/sbin/powertop
modprobe cpufreq_stats failedLoaded 0 prior measurements
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask f
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask f
Devfreq not enabled
glob returned GLOB_ABORTED
PowerTOP v2.11    Overview   Idle stats   Frequency stats   Device stats   Tunables   WakeUp


           Pkg(HW)  |            Core(HW) |            CPU(OS) 0   CPU(OS) 2
                    |                     | C0 active   0.1%        0.1%
                    |                     | POLL        0.0%    0.0 ms  0.0%    0.0 ms
                    |                     | C1          0.0%    1.6 ms  0.1%    0.7 ms
C2 (pc2)    3.6%    |                     |
C3 (pc3)    0.0%    | C3 (cc3)    0.0%    | C3          0.0%    0.2 ms  0.0%    0.0 ms
C6 (pc6)    0.0%    | C6 (cc6)    0.0%    | C6          0.0%    0.8 ms  0.0%    0.1 ms
C7 (pc7)    0.0%    | C7 (cc7)   99.4%    | C7s         0.0%    0.0 ms  0.0%    0.0 ms
C8 (pc8)   95.2%    |                     | C8          0.3%    2.2 ms  0.3%    1.4 ms
C9 (pc9)    0.0%    |                     | C9          0.0%    3.0 ms  0.1%    4.6 ms
C10 (pc10)  0.0%    |                     |
                    |                     | C10        99.3%  129.0 ms 99.3%  122.4 ms
                    |                     | C1E         0.2%    3.6 ms  0.1%    1.2 ms

                    |            Core(HW) |            CPU(OS) 1   CPU(OS) 3
                    |                     | C0 active   0.1%        0.0%
                    |                     | POLL        0.0%    0.0 ms  0.0%    0.0 ms
                    |                     | C1          0.6%    0.3 ms  0.2%    0.2 ms
                    |                     |
                    | C3 (cc3)    0.0%    | C3          0.0%    0.1 ms  0.0%    0.0 ms
                    | C6 (cc6)    0.0%    | C6          0.0%    0.0 ms  0.0%    0.0 ms
                    | C7 (cc7)   99.3%    | C7s         0.0%    0.0 ms  0.0%    0.0 ms
                    |                     | C8          0.0%    0.0 ms  0.0%    1.0 ms
                    |                     | C9          0.0%    0.0 ms  0.0%    0.0 ms
                    |                     |
                    |                     | C10        99.3%  159.2 ms 99.7%  220.5 ms
                    |                     | C1E         0.0%    0.0 ms  0.0%    0.0 ms

                    |             GPU     |
                    |                     |
                    | Powered On  0.0%    |
                    | RC6       100.0%    |
                    | RC6p        0.0%    |
                    | RC6pp       0.0%    |
                    |                     |
                    |                     |
                    |                     |
                    |                     |
                    |                     |
                    |                     |
                    |                     |

Power est.    Usage     Device name
              0.0%        I2C Adapter (i2c-1): i915 gmbus dpb
              0.0%        I2C Adapter (i2c-4): i915 gmbus dpd
              0.0%        I2C Adapter (i2c-2): i915 gmbus dpc
              0.0%        I2C Adapter (i2c-3): i915 gmbus misc


--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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