Ubuntu
nvidia-prime package

New on-demand default causes RTD3 never to be enabled

Bug #1946476 reported by Alberto Milone
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OEM Priority Project
Fix Released
Critical
Dirk Su
nvidia-prime (Ubuntu)
Fix Released
Critical
Alberto Milone
Focal
Fix Released
Undecided
Unassigned
Hirsute
Incomplete
Undecided
Unassigned
Impish
Fix Released
Undecided
Unassigned

Bug Description

As per LP: #1942307 we now set on-demand as the default. This however, causes "prime-select on-demand", called by ubuntu-drivers, not to even try to detect RTD3 and to enable it, since "on-demand" is already set.

We cannot make informed choices about RTD3 in the postinstallation script of nvidia-prime, therefore we should simply drop the check that prime-select makes to abort if the new profile is determined to be the same as the current profile.

---

[Impact]

 * Ubuntu will set GPU mode to performance as default which may use more power
 * User can't use GPU for other purpose (eg: deep-learning) if RTD3 is not supported
 * According to Nvidia README, the RTD3 doesn't support on non-laptop machine

[Test Plan]

 * Install Ubuntu, and then execute 'ubuntu-drivers install' to install GPU driver. After the installation, reboot the system. Execute "prime-select query" should get "on-demand"
 * Old GPU (which supported by nvidia-390 only) will keep in performance mode, refer LP:1957094. Execute "prime-select query" should get "nvidia"
 * On non-laptop machine. Can set GPU mode to on-demand
 * On laptop with GPU in runtime PM support list. Set GPU mode to on-demand and Nvidia driver is loaded with "NVreg_DynamicPowerManagement=0x02"

[Where problems could occur]

 * With GPU supported RTD3 not able enable runtime PM on non-laptop. But based on the Nvidia README, this case shall not happened.

[Other Info]

Changelogs:

nvidia-prime (0.8.16~0.20.04.2) focal; urgency=medium

  [ Jeremy Szu ]
  * Set on-demand mode as default nvidia mode (LP: #1942307)

  [ Alberto Milone ]
  * prime-select:
    - Detect chassis type and enable RTD3 only
      on laptops (LP: #1942788).
    - on-demand mode doesn't need to depend on
      RTD3 (LP: #1942789).
    - Use bootvga detection when last_gfx_boot
      is not available.
    - Don't check the current profile when setting
      a profile (LP: #1946476).
    - Handle BrokenPipeError (LP: #1965520).

See original description
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package nvidia-prime - 0.8.17.1

---------------
nvidia-prime (0.8.17.1) impish; urgency=medium

  * prime-select:
    - Don't check the current profile when setting
      a profile (LP: #1946476).

 -- Alberto Milone <email address hidden> Fri, 08 Oct 2021 14:25:10 +0200

Changed in nvidia-prime (Ubuntu):
status: In Progress → Fix Released
jeremyszu (os369510)
Changed in oem-priority:
assignee: nobody → jeremyszu (os369510)
importance: Undecided → Critical
Dirk Su (dirksu)
description: updated
Revision history for this message
Brian Murray (brian-murray) wrote : Missing SRU information

Thanks for uploading the fix for this bug report to -proposed. However, when reviewing the package in -proposed and the details of this bug report I noticed that the bug description is missing information required for the SRU process. You can find full details at http://wiki.ubuntu.com/StableReleaseUpdates#Procedure but essentially this bug is missing some of the following: a statement of impact, a test case and details regarding where problems may occur. Thanks in advance!

Changed in nvidia-prime (Ubuntu Focal):
status: New → Incomplete
Changed in nvidia-prime (Ubuntu Impish):
status: New → Incomplete
status: Incomplete → Fix Released
Changed in nvidia-prime (Ubuntu Hirsute):
status: New → Incomplete
Dirk Su (dirksu)
Changed in oem-priority:
assignee: jeremyszu (os369510) → Dirk Su (dirksu)
description: updated
Dirk Su (dirksu)
description: updated
Dirk Su (dirksu)
description: updated
Dirk Su (dirksu)
description: updated
description: updated
Revision history for this message
Dirk Su (dirksu) wrote :

@Brian

I updated the description. Do you think the information in description is enough to continue the SRU process?
And the packages is uploaded to queue.
Focal: https://launchpad.net/ubuntu/focal/+upload/27068997/+files/nvidia-prime_0.8.16~0.20.04.2_source.changes
Hirsute: https://launchpad.net/ubuntu/hirsute/+upload/27068995/+files/nvidia-prime_0.8.16.2~0.21.04.1_source.changes

Rex Tsai (chihchun)
tags: added: oem-priority
Dirk Su (dirksu)
description: updated
Changed in oem-priority:
status: New → Confirmed
Dirk Su (dirksu)
description: updated
Dirk Su (dirksu)
description: updated
Revision history for this message
Chris Halse Rogers (raof) wrote : Please test proposed package

Hello Alberto, or anyone else affected,

Accepted nvidia-prime into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/nvidia-prime/0.8.16~0.20.04.2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in nvidia-prime (Ubuntu Focal):
status: Incomplete → Fix Committed
tags: added: verification-needed verification-needed-focal
Revision history for this message
Dirk Su (dirksu) wrote :

Install Focal on Dell notebook Precision 7750 (202004-27817). Enable focal-proposed channel, install nvidia with "sudo ubuntu-drivers install nvidia" then reboot system. Check system is in on-demand with "prime-select query". Check nvidia module parameter with "cat /proc/driver/nvidia/params | grep DynamicPowerManagement" and get result 2 which means GPU enabled with RTD3.

Revision history for this message
Dirk Su (dirksu) wrote :

Install Focal on HP EliteOne 800 G6 All-in-One (202008-28167). Enable focal-proposed channel, install nvidia with "sudo ubuntu-drivers install nvidia" then reboot system. Check system is in on-demand with "prime-select query". Since this machine has all-in-one in chassis type, only enabled off-load mode and disabled RTD3.

Dirk Su (dirksu)
tags: added: verification-done verification-done-focal
removed: verification-needed verification-needed-focal
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Update Released

The verification of the Stable Release Update for nvidia-prime has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package nvidia-prime - 0.8.16~0.20.04.2

---------------
nvidia-prime (0.8.16~0.20.04.2) focal; urgency=medium

  [ Jeremy Szu ]
  * Set on-demand mode as default nvidia mode (LP: #1942307)

  [ Alberto Milone ]
  * prime-select:
    - Detect chassis type and enable RTD3 only
      on laptops (LP: #1942788).
    - on-demand mode doesn't need to depend on
      RTD3 (LP: #1942789).
    - Don't check the current profile when setting
      a profile (LP: #1946476).
    - Handle BrokenPipeError (LP: #1965520).

 -- Alberto Milone <email address hidden> Thu, 28 Oct 2021 16:40:04 +0200

Changed in nvidia-prime (Ubuntu Focal):
status: Fix Committed → Fix Released
Dirk Su (dirksu)
Changed in oem-priority:
status: Confirmed → Fix Released
To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.