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[Martin Öhrling <martin@xxxxxxxxxxxxxxxxx>]

Public bug reported:

There is two AMD gpu:s installed in my computer. The first one uses the
fglrx module and is the one that is intended to be used for the linux
desktop. The second is intended for gpu passthrough and owned by pci-
stub.

gpu-manager makes the assumption that a card shall be used based on
vendor/device id and if the fglrx module is loaded. That is not
sufficient in this case. I have not verified if the same applies to xen-
pciback but it seems likely.

My workaround has been to use the fake lspci file option and a manually
created xorg.conf. Everything worked fine before I changed one of the
cards to use the pci-stub module. The result before use of fake_lspci
was a permanently blank screen.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubuntu-drivers-common 1:0.2.98.4
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Nov 27 22:07:08 2014
InstallationDate: Installed on 2014-01-18 (312 days ago)
InstallationMedia: Ubuntu-Server 13.10 "Saucy Salamander" - Release amd64 (20131016)
SourcePackage: ubuntu-drivers-common
UpgradeStatus: Upgraded to utopic on 2014-10-29 (29 days ago)
mtime.conffile..etc.init.gpu.manager.conf: 2014-11-26T23:10:48.005964

** Affects: ubuntu-drivers-common (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug utopic

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https://bugs.launchpad.net/bugs/1397124

Title:
  gpu-manager tries to use pci-stub module as a vga driver

Status in “ubuntu-drivers-common” package in Ubuntu:
  New

Bug description:
  There is two AMD gpu:s installed in my computer. The first one uses
  the fglrx module and is the one that is intended to be used for the
  linux desktop. The second is intended for gpu passthrough and owned by
  pci-stub.

  gpu-manager makes the assumption that a card shall be used based on
  vendor/device id and if the fglrx module is loaded. That is not
  sufficient in this case. I have not verified if the same applies to
  xen-pciback but it seems likely.

  My workaround has been to use the fake lspci file option and a
  manually created xorg.conf. Everything worked fine before I changed
  one of the cards to use the pci-stub module. The result before use of
  fake_lspci was a permanently blank screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubuntu-drivers-common 1:0.2.98.4
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
  Uname: Linux 3.16.0-24-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Nov 27 22:07:08 2014
  InstallationDate: Installed on 2014-01-18 (312 days ago)
  InstallationMedia: Ubuntu-Server 13.10 "Saucy Salamander" - Release amd64 (20131016)
  SourcePackage: ubuntu-drivers-common
  UpgradeStatus: Upgraded to utopic on 2014-10-29 (29 days ago)
  mtime.conffile..etc.init.gpu.manager.conf: 2014-11-26T23:10:48.005964

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