Created attachment 1112851 [details] device list Description of problem: nouveau driver causes laptop to lockup at boot on Acer laptop with two video cards Version-Release number of selected component (if applicable): xorg-x11-drv-nouveau-1.0.12-1.fc23 How reproducible: Every time Steps to Reproduce: 1. Disable nomodeset 2. Start laptop 3. Watch screen of nouveau error messages Actual results: Laptop locks up or reboots Expected results: Laptop will boot normally using Intel VGA controller Additional info: Adding 'nouveau.modeset=0' to kernel parameters functions as a workaround. New Acer Aspire VN7-792G laptop booting with UEFI and Secure Boot enabled. Fresh Fedora 23 install from LiveCD. Laptop has Intel VGA device 'VGA compatible controller: Intel Corporation Device 191b (rev 06)' Laptop has discrete NVIDIA GTX960m device '3D Controller: NVIDIA Corporation GM107M [GeForce GTX 960M] (rev a2)'
Created attachment 1112853 [details] xorg driver list
Created attachment 1112854 [details] kernel module list
I also noticed there is no /sys/kernel/debug/vga_switcheroo file created. This probably because I had to use 'nomodeset' to install Fedora from the LiveCD. Please let me know what other information you require.
Created attachment 1112855 [details] boot message 1
Created attachment 1112856 [details] boot message 2
Created attachment 1112857 [details] boot message 3
Created attachment 1112858 [details] boot message 4
Apologies for the file format, but I have attached some screenshots of the messages nouveau writes when I remove the modeset kernel parameter. Hopefully there is some information in them that might be useful.
I just updated to the 4.4.2-300 kernel in updates-testing. This is a huge improvement on hardware support from the earlier kernel versions. With this kernel I can boot the laptop without the nomodeset options, nouveau is detecting the card and things seem to be playing nicely. I have working HDMI video output, and I was able to play a video with audio to my TV. The Intel chip is running most things, OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) I also now see the vgaswitcheroo: cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :DynOff:0000:01:00.0
Will monitor the battery usage, this kernel update may improve battery life significantly on this laptop also.
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Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.