Public bug reported:
1.
No LSB modules are available.
Description: Ubuntu 24.04 LTS
Release: 24.04
2.
udev:
Installed: 255.4-1ubuntu8
Candidate: 255.4-1ubuntu8
Version table:
*** 255.4-1ubuntu8 500
500 http://au.archive.ubuntu.com/ubuntu noble/main amd64 Packages
100 /var/lib/dpkg/status
3.
Xorg should init via sddm, gd3m, or lightdm
4.
Display manager fails to init, remaining at console.
I have an eGPU device connected via thunderbolt
● Razer Core X
├─ type: peripheral
├─ name: Core X
├─ vendor: Razer
├─ uuid: 00c998e0-6fea-2701-ffff-ffffffffffff
├─ generation: Thunderbolt 3
It is mounted onto MSI MS-7E06 motherboard with a thunderbolt card. The
card is correctly detected and enabled on bootup.
I have a NVIDIA 4070GTX installed on the eGPU device
VGA compatible controller: NVIDIA Corporation AD104 [GeForce RTX 4070]
(rev a1)
I have installed the NVIDIA 550 drivers associated with this device
However, the presence of a GPU in an eGPU is not correctly detected
after bootup. The various NVIDIA services at startup all present failure
on bootup.
Sddm fails to start after multiple retries. Switching display manager to
gdm3 or lightdm results in the same failure.
An `lspci` fails to show the device on the console.
I manually added a systemd daemon to scan the PCI bus before the display
manager begins with:
echo "1" | sudo tee /sys/bus/pci/rescan > /dev/null
This then correctly identifies the device in the PCI bus, and then the
display manager proceeds to start appropriately. eGPU functionality is
limited to compute unless I manually insert xorg.conf.d rules, but that
is an unrelated issue to do with limited eGPU support currently with
xorg/wayland.
I believe the PCI bus needs to be scanned with udev rules when a
thunderbolt device is detected/inserted.
** Affects: udev (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2064068
Title:
Display manager fails needing pci rescan with thunderbolt eGPU
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