What's the output of `cat /sys/power/mem_sleep`?
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https://bugs.launchpad.net/bugs/1864930
Title:
brightness setting and sleep/suspend (echo mem > /sys/power/state) ,
s2ram and s2disk fail for 5.4.0 and s2disk fail for 5.4.22
Status in linux package in Ubuntu:
Confirmed
Bug description:
1) After resuming from suspend (uswsusp/s2ram) and/or after resuming
from "echo mem > /sys/power/state" there is a black screen on laptop
after resume with 5.4.0-14-generic kernel only. Kernel seems to be
working as CTRL+ALT+F2 and CTRL+ALT+DEL restarts laptop.
A) 3 Different combinations of this distro with other kernels work
well:
kubunut20.04 + linux-image-5.3.0-40-generic
(copied from kubuntu 19.10 from /lib/modules/5.3.0-40-generic and
/boot/vmlinuz-5.3.0-40-generic)
Installed from
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6-rc3/
kubuntu20.04 + linux-image-unsigned-5.5.6-050506-generic is working.
kubuntu20.04 + linux-image-unsigned-5.6.0-050600rc3-generic is working.
B) This kernel 5.4.0-14-generic when copied manually into kubuntu 19.10
behaves the same as in 20.04 (NOT WORKING for suspend to ram)
2) setting brightness with keys on laptop keyboard does not work for this
kernel 5.4.0-14-generic only
Neither using this command line method
marian@kubuntu2004:~/Downloads$ cat
/sys/class/backlight/intel_backlight/max_brightness
255
marian@kubuntu2004:~/Downloads$ cat
/sys/class/backlight/intel_backlight/max_brightness
255
marian@kubuntu2004:~/Downloads$ cat
/sys/class/backlight/intel_backlight/actual_brightness
255
marian@kubuntu2004:~/Downloads$ cat
/sys/class/backlight/intel_backlight/brightness
242
marian@kubuntu2004:~/Downloads$ echo 200 | sudo tee
/sys/class/backlight/intel_backlight/brightness
200
marian@kubuntu2004:~/Downloads$ cat
/sys/class/backlight/intel_backlight/brightness
Again kernel 5.3 copied into kubuntu20.04 got working brigthness keys.
However this works for all tested kernels above (including 5.4.0-14-generic)
xrandr --output eDP-1 --brightness 0.8
3) after uswsusp/hibernate (s2disk) and "echo disk > /sys/power/state" do
not seem to resume/thaw
for those kernels: linux-image-5.4.0-14-generic,
linux-image-unsigned-5.5.6-050506-generic ,
linux-image-unsigned-5.6.0-050600rc3-generic, on the other hand kernel
linux-image-5.3.0-40-generic manually copied from kubuntu 19.10 into kubuntu
20.04 seems to be working fine when thawing/resuming from hibernation.
Again I tested different combination of kernels and distros for this issue.
This kernel (5.4.0-14-generic) also does not work for hibernate/resume even
when copied from kubuntu20.04 into kubuntu19.10
4)
Starting kubuntu without installation from daily build from 25th Feb 2020
shows the same problem for brightness setting and for black screen after
resuming from sleep.
http://cdimage.ubuntu.com/kubuntu/daily-live/current/
Note I always recreated imagerd in target place when copied kernels manually:
update-initramfs -u -k 5.3.0-40-generic
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-14-generic 5.4.0-14.17
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: marian 1214 F.... pulseaudio
CurrentDesktop: KDE
Date: Wed Feb 26 22:20:29 2020
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 8087:0a2b Intel Corp.
Bus 001 Device 002: ID 05c8:0815 Cheng Uei Precision Industry Co., Ltd
(Foxlink) HP Wide Vision FHD Camera
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP Spectre x360 Convertible 13-ae0xx
ProcEnviron:
LANGUAGE=
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-14-generic
root=/dev/mapper/sysvg-ub2004deboot ro resume=/dev/nvme0n1p8 quiet splash
resume=/dev/nvme0n1p8 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-14-generic N/A
linux-backports-modules-5.4.0-14-generic N/A
linux-firmware 1.186
SourcePackage: linux-5.4
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 01/07/2019
dmi.bios.vendor: AMI
dmi.bios.version: F.24
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 83B9
dmi.board.vendor: HP
dmi.board.version: 56.43
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAMI:bvrF.24:bd01/07/2019:svnHP:pnHPSpectrex360Convertible13-ae0xx:pvr:rvnHP:rn83B9:rvr56.43:cvnHP:ct31:cvrChassisVersion:
dmi.product.family: 103C_5335KV HP Spectre
dmi.product.name: HP Spectre x360 Convertible 13-ae0xx
dmi.product.sku: 2QH34EA#ABU
dmi.sys.vendor: HP
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