Public bug reported:
Ubuntu 5.4.0-29.33-generic 5.4.30
I am using Legacy mode in BIOS to boot laptop.
I hibernate (I tried "systemctl hibernate" and "sudo hibernate") to swap file
(allocated size 18GB what is 2GB more than my RAM size) and both methods
hibernates to file OK.
After hibernation I want to resume.
First resume always ends suspended on color bars after ca 1 min and 2 times
backlighted screen meantime. Keyboard driver can accept CTL+ALT+DEL to restart
or I can power off and power on again.
Second restart always loads grub normally and after I choose default ooot
option it correctly resumes from swap file but it should work in this way from
the first resume try.
I've tried updated grub with options: nosplash, noquiet, nomodeset and
even keeping shift in BIOS to see what's going during failed resume but
no success.
nomodeset option doesn't show color bars, but finishes with backlighted black
screen only.
Keeping shift in BIOS shows: " RUB loading" without G but after minute it ends
on blank backlighted screen. Keeping ESC doesn't help to see any line from boot
even nosplash and noquiet is active.
Normal suspend and resume from suspend works but hibernation not.
Only dmesg line is concerning, but I think nomodeset should eliminate if it
would be i915 problem.
[ 10.015720] i915 0000:00:02.0: [drm:intel_dp_aux_init_backlight_funcs
[i915]] Panel advertises DPCD backlight support, but VBT disagrees. If your
backlight controls don't work try booting with i915.enable_dpcd_backlight=1. If
your machine needs this, please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
Anyway backlight controls is working OK without nomodeset option.
HP BIOS is updated from 01/05/2020 and laptop is about 4 years old.
System:
Host: UB820 Kernel: 5.4.0-29-generic x86_64 bits: 64 Desktop: Gnome 3.36.1
Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine:
Type: Laptop System: HP product: HP EliteBook 820 G3 v: N/A
serial: <superuser/root required>
Mobo: HP model: 807C v: KBC Version 85.79
serial: <superuser/root required> UEFI [Legacy]: HP v: N75 Ver. 01.45
date: 01/05/2020
Battery:
ID-1: BAT0 charge: 34.0 Wh condition: 35.1/35.1 Wh (100%)
CPU:
Topology: Dual Core model: Intel Core i5-6300U bits: 64 type: MT MCP
L2 cache: 3072 KiB
Speed: 800 MHz min/max: 400/3000 MHz Core speeds (MHz): 1: 800 2: 800
3: 800 4: 800
Graphics:
Device-1: Intel Skylake GT2 [HD Graphics 520] driver: i915 v: kernel
Display: x11 server: X.Org 1.20.8 driver: vesa unloaded: fbdev,modesetting
resolution: 1366x768~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 520 (SKL GT2) v: 4.6 Mesa 20.0.4
Audio:
Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.4.0-29-generic
Network:
Device-1: Intel Ethernet I219-LM driver: e1000e
IF: enp0s31f6 state: down mac: XX:XX:XX:XX:XX:XX
Device-2: Intel Wireless 8260 driver: iwlwifi
IF: wlp2s0 state: up mac: XX:XX:XX:XX:XX:XX
Device-3: HP HP lt4120 Snapdragon X5 LTE type: USB driver: cdc_ether
IF: enxda94de160772 state: up speed: N/A duplex: N/A
mac: XX:XX:XX:XX:XX:XX
Drives:
Local Storage: total: 704.24 GiB used: 26.12 GiB (3.7%)
ID-1: /dev/sda vendor: Samsung model: SSD 860 EVO 500GB size: 465.76 GiB
ID-2: /dev/sdb vendor: Samsung model: MZNLN256HCHP-000H1 size: 238.47 GiB
Partition:
ID-1: / size: 457.45 GiB used: 26.12 GiB (5.7%) fs: ext4 dev: /dev/sda1
Sensors:
System Temperatures: cpu: 38.5 C mobo: 0.0 C
Fan Speeds (RPM): N/A
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: from hibernation hp laptop resume
** Attachment added: "lspci"
https://bugs.launchpad.net/bugs/1877476/+attachment/5368072/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/1877476
Title:
HP 820 G3 resume from hibernation hangs with color bars
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