Red Hat Bugzilla – Bug 1309370
Optimus laptop external monitor stop working with kernel 4.5
Last modified: 2016-02-17 11:58:10 EST
Description of problem:
An external monitor was working fine using rawhide with kernel 4.3 on a optimus laptop with the external monitor output connected only to the nvidia card.
However with the kernel 4.5 in latest rawhide that stopped working.
xrandr doesn't detect the external monitor and it says that the HDMI is disconnected.
DRI_PRIME=1 glxgears works as expected.
The card is: GeForce GT 520M
OpenGL ES 3.0 Mesa 11.2.0-devel
Gallium 0.4 on NVD9
Can you please attach dmesg output from both the working and non working kernels?