[HP Probook 450 G6] Laptop Monitor Turns off During Startup, but older kernel versions work (updated system log)

[Andrew White]

I had previously submitted this bug here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1937914 , but I submitted a system log from an older, working version of Ubuntu rather than from the failing version. This report has the updated log.

While starting the my laptop

(Computer Model: HP Probook 450 G6
ProdID 5YH15UT#ABA
Memory: 15.5 GB
Processor: Intel Core i7-8565U CPU @ 1.80GHz x 8
Graphics: NV118 / Mesa Intel UHD Graphics 620 (WHL GT2)
Disk Capacity: 256.1 GB)

which runs

(OS Name: Ubuntu 20.04.2 LTS
OS Type: 64-bit
GNOME Version: 3.36.8
Windowing System: X11)

the monitor turns off as soon as Ubuntu loads. The OS loads as normal and my external monitor still works, but my laptop monitor does not. I was able to fix the problem by pressing ESC as soon as the HP logo appears during start-up, then selecting "Advanced Ubuntu Options", then choosing an older version of Ubuntu (currently that's ...5.4.0-48..., while I believe the latest version is ...5.8.0-66...).

It seems clear that this problem is caused by a bug that was introduced in one of the more recent updates (...5.8.0-59..., maybe?). I am not at all sure that the problem is in xorg; the package identification webpage just suggested that, if the monitor is blank when I would expect to see the Ubuntu logo during startup, then I should say that the relevant package is xorg.

I am more than happy to run additional diagnostics that you would recommend if that would help you diagnose and fix the problem.

Thank you.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-25-generic 5.11.0-25.27~20.04.1
ProcVersionSignature: Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 6 10:34:40 2021
InstallationDate: Installed on 2021-07-06 (30 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)

[Bruno (bruno-42)]

It looks like https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.8/+bug/1934647 is about the same. Here it's Intel UHD Graphics 620 - there it's about nvidia.

5.8.0-55 is fine
5.8.0-63 is affected
5.11.0-25 is affected

Using 5.8.0-63 (or 5.11.0-25) the internal display is black - but the system is running "normal" (ssh, HDMI display)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Bruno (bruno-42)]

I did stop gdm3 and created Xorg.log (via ssh and startx) for 5.8.0-55 (which is fine) and 5.8.0-63 (where the internal display is black).
EDID & modelines do look the same, input/event are numbered differently, SynPS/2 Synaptics TouchPad (*-63) vs PS/2 Generic Mouse (*-55)

[Bruno (bruno-42)]

I added:
prevboot1.txt (5.8.0-63)
prevboot2.txt (5.11.0-25)
prevboot3.txt (5.8.0-55)

journalctl -b-1 > prevboot1.txt
...

Booting with
GRUB_CMDLINE_LINUX_DEFAULT="nomodeset "
the internal display works (5.8.0-63, 5.11.0-25) - but the resolution is 1024x768 instead of 1920x1080

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Eugeny Bachar (eugenybachar)]

Exact same behaviour for me and my collegues on HP Probook 450 G7:

HP ProBook 450 G7 (8VU58EA#ACB)
CPU: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
RAM: 16Gb
GPU: Intel UDH Graphics
Disk: SSD WDC PC SN520 SDAPNUW-512G-1006

[Bruno (bruno-42)]

This might be related to https://gitlab.freedesktop.org/drm/intel/-/issues/3569
HP ProBook 450 G6, HP ProbBok 450 G7, HP EliteBook 850 G5, HP OMEN 15 (dc-0019ur)

HP ProBook 450 G6 shows:

sudo lspci -kv

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake) (rev 02)
(prog-if 00 [VGA controller])
 DeviceName: Onboard IGD
 Subsystem: Hewlett-Packard Company UHD Graphics 620 (Whiskey Lake)
 Flags: bus master, fast devsel, latency 0, IRQ 145
 Memory at f0000000 (64-bit, non-prefetchable) [size=16M]
 Memory at e0000000 (64-bit, prefetchable) [size=256M]
 I/O ports at 4000 [size=64]
 Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
 Capabilities: [40] Vendor Specific Information: Len=0c <?>
 Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
 Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
 Capabilities: [d0] Power Management version 2
 Capabilities: [100] Process Address Space ID (PASID)
 Capabilities: [200] Address Translation Service (ATS)
 Capabilities: [300] Page Request Interface (PRI)
 Kernel driver in use: i915
 Kernel modules: i915

edid-decode /sys/class/drm/card0-eDP-1/edid

edid-decode (hex):

00 ff ff ff ff ff ff 00 30 e4 2e 06 00 00 00 00
00 1d 01 04 95 22 13 78 03 38 d5 97 5e 59 8e 27
1c 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 24 36 80 a0 70 38 1f 40 30 20
35 00 58 c2 10 00 00 19 18 24 80 a0 70 38 1f 40
30 20 35 00 58 c2 10 00 00 19 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02
00 0c 3a ff 0a 3c 7d 13 14 26 7d 00 00 00 00 2f

----------------

EDID version: 1.4
Manufacturer: LGD Model 1582 Serial Number 0
Made in year 2019
Digital display
6 bits per primary color channel
DisplayPort interface
Maximum image size: 34 cm x 19 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing includes the native pixel format and preferred refresh rate
Display is continuous frequency
Color Characteristics
  Red: 0.5898, 0.3701
  Green: 0.3496, 0.5546
  Blue: 0.1552, 0.1103
  White: 0.3134, 0.3291
Established Timings I & II: none
Standard Timings: none
Detailed mode: Clock 138.600 MHz, 344 mm x 194 mm
               1920 1968 2000 2080 ( 48 32 80)
               1080 1083 1088 1111 ( 3 5 23)
               -hsync -vsync
               VertFreq: 59.977 Hz, HorFreq: 66.635 kHz
Detailed mode: Clock 92.400 MHz, 344 mm x 194 mm
               1920 1968 2000 2080 ( 48 32 80)
               1080 1083 1088 1111 ( 3 5 23)
               -hsync -vsync
               VertFreq: 39.985 Hz, HorFreq: 44.423 kHz
Empty Descriptor
Manufacturer-Specified Display Descriptor (0x02): 00 02 00 0c 3a ff 0a 3c 7d 13 14 26 7d 00 00 00 ....:..<}..&}...
Checksum: 0x2f

[azen0r (azen0r)]

solved with newest 5.11.0-38-generic kernel update (Ubuntu20.04.3)