ksmserver-logout-greeter crashes after GPU switch using prime-select

[Jonas Bosse]

System: Linux Mint 18.1 KDE 64bit Beta
Nvidia Driver: nvidia-367.57

Steps to reproduce the bug on Laptop with Nvidia Optimus:
1. switch the GPU using Nvidia Prime GUI or "sudo prime-select ALERNATIVE"
2. select "Abmelden" (logout on a german system) in the K-menue -> nothing happens
or
2. select "Neustart" (Reboot) or "Herunterfahren" (Shut down) -> you get a massage that ksmserver-logout-greeter crashed with the attached bug report.

see also: http://askubuntu.com/questions/866754/ksmserver-logout-greeter-crash-after-switching-from-intel-to-nvidia-gpu

[Ľudovít Lučenič (llucenic)]

Similar happens with KDE Neon 5.10.2 and nvidia-340. Logout is effectively disabled by crash message. Using 'loginctl terminate-session <id>' closes the session properly.

[Ľudovít Lučenič (llucenic)]

Switching back to Intel graphics however renders the logout from Plasma functional.

[Frâncio (franciobr)]

I have the same problem with Linux Mint 18.2 KDE. It might be affecting the nvidia-prime functionality because even after I manage to logout with 'loginctl terminate-session' the gpu doesn't switch and goes back to intel by default. Very troublesome.

[Jeremy Sanders (jeremysanders)]

Also affecting Ubuntu artful. The following message is in the xserver logs:

No XVisualInfo for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize -1, redBufferSize 1, greenBufferSize 1, blueBufferSize 1, alphaBufferSize -1, stencilBufferSize -1, samples -1, swapBehavior QSurfaceFormat::SwapBehavior(SingleBuffer), swapInterval 1, profile QSurfaceFormat::OpenGLContextProfile(NoProfile))

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[cmc302a (cmolina11)]

I can confirm that this bug affects Mint 18.2 Sylvia (KDE edition). Currently using Plasma 5.8.9 , KDE Frameworks 5.36.0 , Qt version 5.6.1, kernel 4.13.0-45-generic, 64 bits OS.

Seems that the bug might be purely KDE related:

bugs.kde.org/show_bug.cgi?id=366156

Of note, some users have detected the big while switching from nvidia -» intel, while others have ellicited it while going from intel -» nvidia. It seems that it goes both ways.

See attachment for output after crash.