Public bug reported:
Description: Ubuntu 25.10
Release: 25.10
running ventroy kubuntu iso, unable to get to ssd install to run command
after install with no monitors.
Operating System: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-5-generic (64-bit)
Graphics Platform: Wayland
Processors: 24 × 12th Gen Intel® Core™ i9-12900K
Memory: 64 GiB of RAM (62.6 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 4090
Graphics Processor 2: Intel® UHD Graphics 770
I am on a 2x monitor setup using display port.
$ xrandr --listmonitors
Monitors: 2
0: +*DP-2 3840/621x2160/341+0+0 DP-2
1: +DP-3 3840/621x2160/341+3841+0 DP-3
Also using nvida graphics card
sudo lshw -C display
*-display
description: VGA compatible controller
product: AD102 [GeForce RTX 4090]
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 bus_master cap_list rom fb
configuration: depth=32 driver=nouveau latency=0 resolution=3840,2160
resources: irq:155 memory:42000000-42ffffff memory:60000000-6fffffff
memory:70000000-71ffffff ioport:5000(size=128) memory:43000000-4307ffff
*-display
description: Display controller
product: AlderLake-S GT1
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0c
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:153 memory:41000000-41ffffff memory:50000000-5fffffff
ioport:6000(size=64) memory:45000000-4bffffff
STEPS TO REPRODUCE
1. Ventroy to install Kubuntu 25.10
2. Installed with complete drive wipe + get latest updates
3. Reboot, screen flashes with text then goes black, then monitors go to sleep
OBSERVED RESULT
On startup, black screen then monitors go to sleep.
Able to take a screenshot and it was a bunch of nouveau errors.
Video of startup:
https://drive.google.com/file/d/1P0hyeR_CHP1oNcqezDILzJmhu-HWxNNg/view?usp=drive_link
EXPECTED RESULT
kubuntu login page
Additional notes:
- Made a bug report here https://bugs.kde.org/show_bug.cgi?id=518675, but think
it was the wrong place.
- Tried to use the "$ ubuntu-bug xserver-xorg-video-nouveau", and it gave the
output of "The problem cannot be reported". Likely because I am on the live iso
and can not get to the ssd to run it against that...
** Affects: xserver-xorg-video-nouveau (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "nouveau errors screenshot"
https://bugs.launchpad.net/bugs/2147487/+attachment/5959402/+files/Screenshot_20260407_224251.png
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https://bugs.launchpad.net/bugs/2147487
Title:
nouveau invalid native reply 0x03 on boot, then displays turn off
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