[Bug 1822026] Re: Live USB freezes or cannot complete install when nouveau driver is loaded

[Pierre Equoy]

Just to make sure, I updated the BIOS of this device from 1.4.2 to
1.7.0. However, the same problems arise. Please find dmesg from an
updated BIOS with nouveau drivers activated (i.e. default mode)

** Attachment added: "dmesg_nouveau_activated_biosv1.7.0.log"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1822026/+attachment/5249990/+files/dmesg_nouveau_activated_biosv1.7.0.log

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Title:
  Live USB freezes or cannot complete install when nouveau driver is
  loaded

Status in ubiquity package in Ubuntu:
  New

Bug description:
  When I boot the Disco 19.04 beta live USB, I can see a lot of errors
  related to nouveau in dmesg.

  Because of this, `lspci` freezes, so reporting an issue is impossible
  either with ubuntu-bug or sosreport (in both cases, the log gathering
  stops when trying to get the output from lspci).

  In addition, when nouveau is enabled:

  - the touchpad becomes unresponsive or behaves in a very weird way (slowing down, jumping), forcing me to use an external mouse or the little pointer in the middle of the keyboard.
  - the device cannot be powered off or restarted. It freezes and nothing can be done (I tried SysRq+REISUB to no avail)

  To avoid this issue, I need to launch the live USB with the following
  command line:

  $ cat /proc/cmdline
  BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash modprobe.blacklist=nouveau ---

  (that is, add `modprobe.blacklist=nouveau` to the command line in
  Grub)

  In the BIOS, I activated both GPUs (Intel and nvidia), which is the
  default settings.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: ubiquity 19.04.7
  ProcVersionSignature: Ubuntu 5.0.0-7.8-generic 5.0.0
  Uname: Linux 5.0.0-7-generic x86_64
  ApportVersion: 2.20.10-0ubuntu23
  Architecture: amd64
  CasperVersion: 1.402
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar 28 03:23:52 2019
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash modprobe.blacklist=nouveau ---
  LiveMediaBuild: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190326.2)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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