[Bug 1944039] [NEW] Ubiquity installs non-bootable hyrbrid system when nvidia graphics is available

[Rocko]

Public bug reported:

I installed Ubuntu 21.10 using ubiquity on a Legion Slim 7 with an amd
cpu/gpu using the amd gpu to drive the laptop screen but also an nvidia
graphics card. The installer ran fine but the installed image failed to
boot, just showing a blank screen. The installer had installed both the
amdgpu and nvidia drivers but was trying to use only the nvidia driver,
which failed to display the login screen on either the laptop screen
driven through the amd gpu or on the external monitor driven through the
nvidia card.

The solution turned out to be to run "sudo prime-select intel" (or more
appropriately, "sudo prime-select on-demand", so I could also use prime
and reverse prime), which fixed the problem. (Running prime-select intel
was a bit counter-intuitive because the cpu is not intel so it me took a
long time to figure out the problem.)

When hybrid graphics are in use and ubiquity installs the nvidia driver,
shouldn't it default to prime-select on-demand instead of prime-select
nvidia?

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13
Uname: Linux 5.13.0-16-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu69
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Sep 18 20:31:57 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
InstallationDate: Installed on 2021-09-15 (3 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210910)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug impish ubiquity-21.10.5

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https://bugs.launchpad.net/bugs/1944039

Title:
  Ubiquity installs non-bootable hyrbrid system when nvidia graphics is
  available

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I installed Ubuntu 21.10 using ubiquity on a Legion Slim 7 with an amd
  cpu/gpu using the amd gpu to drive the laptop screen but also an
  nvidia graphics card. The installer ran fine but the installed image
  failed to boot, just showing a blank screen. The installer had
  installed both the amdgpu and nvidia drivers but was trying to use
  only the nvidia driver, which failed to display the login screen on
  either the laptop screen driven through the amd gpu or on the external
  monitor driven through the nvidia card.

  The solution turned out to be to run "sudo prime-select intel" (or
  more appropriately, "sudo prime-select on-demand", so I could also use
  prime and reverse prime), which fixed the problem. (Running prime-
  select intel was a bit counter-intuitive because the cpu is not intel
  so it me took a long time to figure out the problem.)

  When hybrid graphics are in use and ubiquity installs the nvidia
  driver, shouldn't it default to prime-select on-demand instead of
  prime-select nvidia?

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.13.0-16.16-generic 5.13.13
  Uname: Linux 5.13.0-16-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu69
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 18 20:31:57 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2021-09-15 (3 days ago)
  InstallationMedia: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210910)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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