Comment 8 for bug 1939160

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