Backport PRIME switching fixes to Ubuntu 18.04
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| nvidia-prime (Ubuntu) |
Fix Released
|
High
|
Unassigned | ||
| Bionic |
Fix Released
|
High
|
Alberto Milone | ||
| ubuntu-drivers-common (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
| Bionic |
Fix Released
|
High
|
Alberto Milone | ||
Bug Description
SRU Request:
[Impact]
A recent update (LP: #1778011) in 18.04 has restored the PRIME switching mechanism in Gdm 3 only, while still leaving out support for other login managers (such as Lightdm, and SDDM).
In addition to this, we should restore the default pci power control profile for the dGPU when re-enabling performance mode, as we do in Ubuntu 18.10.
[Test Case]
1) Make sure that you are using a login manager such as Lightdm or SDDM.
2) Enable the bionic-proposed repository, and install the new "ubuntu-
3) Make sure the nvidia packages are installed and working, and enable power saving mode:
sudo prime-select intel
4) Log out, log back in, and check that the nvidia kernel module is not loaded:
lsmod | grep nvidia
5) Select performance mode:
sudo prime-select nvidia
6) Log out, and log back in
7) Check if the nvidia driver loaded:
lsmod | grep nvidia
[Regression Potential]
Low, as switching already fails in 18.04, since X is started before udev adds back the dGPU.
| Changed in ubuntu-drivers-common (Ubuntu): | |
| status: | New → In Progress |
| Changed in nvidia-prime (Ubuntu): | |
| status: | In Progress → Fix Released |
| assignee: | Alberto Milone (albertomilone) → nobody |
| Changed in nvidia-prime (Ubuntu Bionic): | |
| assignee: | nobody → Alberto Milone (albertomilone) |
| importance: | Undecided → High |
| status: | New → In Progress |
| Changed in ubuntu-drivers-common (Ubuntu): | |
| status: | In Progress → Fix Released |
| Changed in ubuntu-drivers-common (Ubuntu Bionic): | |
| status: | New → In Progress |
| importance: | Undecided → High |
| assignee: | nobody → Alberto Milone (albertomilone) |
| description: | updated |
| Steve Langasek (vorlon) wrote Please test proposed package | #1 |
| Changed in ubuntu-drivers-common (Ubuntu Bionic): | |
| status: | In Progress → Fix Committed |
| tags: | added: verification-needed verification-needed-bionic |
| Changed in nvidia-prime (Ubuntu Bionic): | |
| status: | In Progress → Fix Committed |
| Steve Langasek (vorlon) wrote | #2 |
| ash (sersorrel) wrote | #3 |
| tags: |
added: verification-done-bionic removed: verification-needed-bionic |
| Brian Murray (brian-murray) wrote Update Released | #4 |
| Launchpad Janitor (janitor) wrote | #5 |
| Changed in ubuntu-drivers-common (Ubuntu Bionic): | |
| status: | Fix Committed → Fix Released |
| Launchpad Janitor (janitor) wrote | #6 |
| Changed in nvidia-prime (Ubuntu Bionic): | |
| status: | Fix Committed → Fix Released |
Hello Alberto, or anyone else affected,
Accepted ubuntu-
Please help us by testing this new package. See https:/
If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-
Further information regarding the verification process can be found at https:/
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.