Driver issue for Intel Alder Lake-P GT2 [Iris Xe Graphics] appears in Noble Numbat

[Todd Wegner]

After upgrading to 24.04 LTS (Noble Numbat) from lubuntu 23.10 the system no longer boots
except in safe mode. A fresh install of Noble Numbat was done, but this did not resolve the problem.

In the grub file /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT='quiet splash' was changed to
GRUB_CMDLINE_LINUX_DEFAULT='quiet splash nomodeset '

and now the system boots.

$ sudo sudo lshw -c video
  *-display
       description: VGA compatible controller
       product: Alder Lake-P GT2 [Iris Xe Graphics]
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       logical name: /dev/fb0
       version: 0c
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list fb
       configuration: depth=32 latency=0 mode=1920x1200 visual=truecolor xres=1920 yres=1200
       resources: iomemory:600-5ff iomemory:400-3ff memory:603c000000-603cffffff memory:4000000000-400fffffff ioport:2000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff
  *-graphics
       product: simpledrmdrmfb
       physical id: 2
       logical name: /dev/fb0
       capabilities: fb
       configuration: depth=32 resolution=1920,1200

$ inxi -G
Graphics:
  Device-1: Intel Alder Lake-P GT2 [Iris Xe Graphics] driver: N/A
  Device-2: Luxvisions Innotech Integrated Camera driver: uvcvideo type: USB
  Display: x11 server: X.Org v: 21.1.11 driver: X: loaded: modesetting,vesa
    unloaded: fbdev dri: swrast gpu: N/A resolution: 1920x1200~60Hz
  API: EGL v: 1.5 drivers: kms_swrast,swrast
    platforms: gbm,x11,surfaceless,device
  API: OpenGL v: 4.5 vendor: mesa v: 24.0.5-1ubuntu1 renderer: llvmpipe
    (LLVM 17.0.6 256 bits)

It would appear that the driver support for Alder Lake-P GT2 [Iris Xe Graphics]
has changed between lubuntu 23.10 and 24.04 LTS (Noble Numbat).

This issue was not observed in lubuntu 23.10.

[Launchpad Janitor (janitor)]

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

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 2067658

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

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