Bug 218785

Summary: HP Victus by HP Laptop 16-e0xxx. HDMI connection doesn't detect counterpart projector.
Product: Drivers Reporter: Sergey Ivanov (icegood1980)
Component: Video(DRI - non Intel)Assignee: drivers_video-dri
Status: NEW ---    
Severity: normal CC: regressions
Priority: P3    
Hardware: All   
OS: Linux   
Kernel Version: Subsystem:
Regression: No Bisected commit-id:

Description Sergey Ivanov 2024-04-27 16:43:43 UTC 
As for me, it is regression.
On the same laptop and different OSes:

1) Linux fedora 6.0.17-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jan 4 16:00:03 UTC 2023 x86_64 GNU/Linux
everything is fine. UDEV has changes during cable plug in:

KERNEL[48.311971] change   /devices/pci0000:00/0000:00:01.1/0000:01:00.0/drm/card0 (drm)
UDEV  [48.317955] change   /devices/pci0000:00/0000:00:01.1/0000:01:00.0/drm/card0 (drm)
KERNEL[49.453282] add      /devices/pci0000:00/0000:00:01.1/0000:01:00.0/graphics/fb1 (graphics)
UDEV  [49.455485] add      /devices/pci0000:00/0000:00:01.1/0000:01:00.0/graphics/fb1 (graphics)

2) In both new ubuntu 
Linux ice-home 6.8.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 00:40:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
and fedora vmlinuz-6.8.7-300.fc40.x86_64

udev is empty. No changes
Comment 1 Sergey Ivanov 2024-04-27 16:46:59 UTC 
laptop has two videocards:

root@ice-home:/home/ice# lshw -C display
  *-display                 
       description: VGA compatible controller
       product: TU117M [GeForce GTX 1650 Mobile / Max-Q]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: /dev/fb0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller cap_list fb
       configuration: depth=32 latency=0 mode=1920x1080 visual=truecolor xres=1920 yres=1080
       resources: iomemory:ff0-fef iomemory:ff0-fef memory:fb000000-fbffffff memory:ffe0000000-ffefffffff memory:fff0000000-fff1ffffff ioport:f000(size=128) memory:fc000000-fc07ffff
  *-display
       description: VGA compatible controller
       product: Cezanne [Radeon Vega Series / Radeon Vega Mobile Series]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: /dev/fb0
       version: c6
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix vga_controller bus_master cap_list fb
       configuration: depth=32 driver=amdgpu latency=0 resolution=1920,1080
       resources: irq:46 memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:c000(size=256) memory:fc500000-fc57ffff
Comment 2 Sergey Ivanov 2024-04-28 08:16:50 UTC 
same empty list is in 

Linux ice-home 6.5.0-28-generic #29-Ubuntu SMP PREEMPT_DYNAMIC Thu Mar 28 23:46:48 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Comment 3 The Linux kernel's regression tracker (Thorsten Leemhuis) 2024-05-01 06:06:58 UTC 
This might be caused by a different or changed kernel config; to check if this really is a regression you need to verify this on one distro -- and ideally bisect, too: https://docs.kernel.org/admin-guide/verify-bugs-and-bisect-regressions.html