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Message #70655
[Bug 1326257] Re: [nvidia-prime] Cannot adjust brightness in guest session and results in black screen while changing the resolution
** Changed in: hwe-next
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1326257
Title:
[nvidia-prime] Cannot adjust brightness in guest session and results
in black screen while changing the resolution
Status in HWE Next Project:
Fix Released
Status in Nvidia Feature Request and Bug Reporting:
New
Status in OEM Priority Project:
Fix Released
Status in OEM Priority Project trusty series:
Fix Released
Status in “nvidia-prime” package in Ubuntu:
In Progress
Status in “ubuntu-drivers-common” package in Ubuntu:
Fix Released
Status in “nvidia-prime” source package in Precise:
In Progress
Status in “ubuntu-drivers-common” source package in Precise:
Invalid
Status in “xorg-server-lts-saucy” source package in Precise:
New
Status in “nvidia-prime” source package in Trusty:
Invalid
Status in “ubuntu-drivers-common” source package in Trusty:
Fix Released
Status in “xorg-server-lts-saucy” source package in Trusty:
New
Bug description:
SRU Request
Systems with Optimus (Intel+NVIDIA GPUs) can have problems with the
backlight (private bug #1290694) and when detecting and switching to
different resolutions (private bug #1285062). Using the intel driver
(with SNA) works better than the current solution (the modesetting
driver).
[Impact]
* Backlight control and resolution changes fail on some Optimus systems.
[Test Case]
* Select performance mode from the nvidia-settings panel and try to adjust the backlight or to cycle through the available resolutions
- Expected: the backlight can be adjusted, and changing the resolution works.
- Bad behavior: the backlight can't be adjusted and changing the resolution can some times result in a black screen.
[Regression Potential]
* Low, as the intel driver is more feature complete than modesetting.
[Other Info]
* N/A
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Running the proprietary nvidia drivers in an Optimus config works
(Intel+NVIDIA) can discover two issues:
1. Cannot adjust brightness in the guest session (private bug #1290694)
[Test Case]
* Switch to guest session and adjust brightness from settings or hotkey or command line
- Expected: Can adjust the brightness
- Bad behavior: Cannot adjust brightness
2. Black screen while changing the resolution (private bug #1285062)
but switching to the guest session results in a black screen.
[Test Case]
* Go to display setting, set rotation to counterclockwise/clockwise/180 degrees and click apply
- Expected results: Can switch display rotation successfully
- Actual results: Black screen when switching display rotation
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