Laptop display screen switches off at boot
Since kernel 5.12, the display screen of my laptop (HP ProBook 450 G6) switches off at boot.
I tried with an external display and it is working fine on it but I can't use the screen of the laptop.
kernel 5.11.16 was fine. I'm currently using the LTS kernel of my distribution (Arch Linux) which is 5.10.42.
uname -a
Linux nut 5.10.42-1-lts #1 SMP Thu, 03 Jun 2021 12:54:28 +0000 x86_64 GNU/Linux
edid-decode "/sys/class/drm/card0-eDP-1/edid"
EDID (hex):
00ffffffffffff0030e4ce0500000000
001c0104952213780338d5975e598e27
1c505400000001010101010101010101
010101010101243680a070381f403020
350058c210000019182480a070381f40
3020350058c210000019000000000000
00000000000000000000000000000002
000c44ff0a3c6e1215246e00000000a7
edid-decode (hex):
00 ff ff ff ff ff ff 00 30 e4 ce 05 00 00 00 00
00 1c 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 44 ff 0a 3c 6e 12 15 24 6e 00 00 00 00 a7
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: LGD
Model: 1486
Made in: 2018
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 6
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 Timing Descriptors:
DTD 1: 1920x1080 59.977 Hz 16:9 66.635 kHz 138.600 MHz (344 mm x 194 mm)
Hfront 48 Hsync 32 Hback 80 Hpol N
Vfront 3 Vsync 5 Vback 23 Vpol N
DTD 2: 1920x1080 39.985 Hz 16:9 44.423 kHz 92.400 MHz (344 mm x 194 mm)
Hfront 48 Hsync 32 Hback 80 Hpol N
Vfront 3 Vsync 5 Vback 23 Vpol N
Empty Descriptor
Manufacturer-Specified Display Descriptor (0x02): 00 02 00 0c 44 ff 0a 3c 6e 12 15 24 6e 00 00 00 '....D..<n..$n...'
Checksum: 0xa7
lspci -kv
[...]
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Hewlett-Packard Company Device 8538
Flags: bus master, fast devsel, latency 0, IRQ 134
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
[...]
Edited by Benoit Izac