Red Hat Bugzilla – Bug 1296885
nouveau driver causes hardware lockup
Last modified: 2016-12-20 12:42:28 EST
Created attachment 1112851 [details]
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
Laptop locks up or reboots
Laptop will boot normally using Intel VGA controller
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:
Will monitor the battery usage, this kernel update may improve battery life significantly on this laptop also.
This message is a reminder that Fedora 23 is nearing its end of life.
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