desktop-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Dominic Chambers, this bug was reported a while ago and there hasn't
been any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal as it will automatically gather
and attach updated debug information to this report:

apport-collect -p xorg 1388647

Please ensure you have xdiagnose installed, and that you click the Yes
button for attaching additional debugging information.

As well, given the information from the prior release is already
available, testing a release prior to the development one would not be
helpful.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
       Status: Confirmed => Incomplete

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1388647

Title:
  DRI_PRIME=1 has no effect in Ubuntu 14.10

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  On an Optimus laptop with both GPUs enabled, having run this command
  so that the Nvidia GPU can be used to offload 3D work from the Intel
  GPU:

  ```
  xrandr --setprovideroffloadsink nouveau Intel
  ```

  Then running this command:

  ```
  DRI_PRIME=1 glxinfo | grep "OpenGL vendor string"
  ```

  provides the incorrect output:

  ```
  OpenGL vendor string: Intel Open Source Technology Center
  ```

  when it should actually show that the Nouveau driver is in use for the
  program.

  This worked previously in Ubuntu 14.04. Apart from only having a 3.16
  kernel (instead of 3.17) Ubuntu 14.10 actually supports recent enough
  versions of the requisite packages necesarry to get DRI 3 offloading
  support, so perhaps this is part of the problem.

  Or, more likely, I notice a Nouveau failure after startup, and then
  again after running xrandr commands, for example:

  ```
  [  170.912483] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
  [  217.550205] thinkpad_acpi: EC reports that Thermal Table has changed
  [  223.857442] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
  [  223.858395] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
  [  223.860200] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x002140 [ !ENGINE ]
  [  224.654622] thinkpad_acpi: EC reports that Thermal Table has changed
  [  825.172094] thinkpad_acpi: EC reports that Thermal Table has changed
  [  831.132156] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
  [  831.133030] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
  [  831.134832] nouveau E[    PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x002140 [ !ENGINE ]
  ```

  Perhaps this is just a regression in either the Nouveau or Intel
  drivers for my hardware. I'm using a Lenovo T430. I can confirm that
  I'm able to start the laptop without errors when I only enable the
  Intel GPU or NVidia GPU separately, and only see this error when both
  GPUs are enabled simultaneously.

  Extra Info:

  1: Description:	Ubuntu 14.10
  Release:	14.10

  2: N/A

  3: The text 'nouveau' should have appeared in the output of the
  command.

  4: The text 'Intel' appeared in the output of the command.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1388647/+subscriptions