You're right, my nvidia card is not turned off. /rpco/acpi/bbswitch listed it as on. Battery usage was better than before, though. Maybe because when not actually using the GPU, it at least scales down to a lower frequency, conserving power (because an additional issue, most likely related to the nvidia drivers, is that the nvidia card always runs at max speed and never turns down. Maybe this is because I'm using a UHD display, not sure. No way to check when running in IGP-mode).
Running the command rmmod nvidia_drm nvidia_modeset nvidia_uvm nvidia gives me a notice that nvidia_uvm is not loaded but does unload the other modules. After that I am able to turn off the nvidia card using the command you provided. Battery usage then drops from around 32 Watts to around 19 Watts in idle, so that's a significant improvement. I can't reproduce your crashes when running lshw or lspci, though, they all run fine, even after turning off the nvidia card. Also running something like phoronix-test-suite is fine, the system remains stable. Maybe that's a difference in kernel and/or nvidia driver versions? I've tested using both linux kernel 4.6.0-040600-generic (4.6.0-040600.201605151930) and 4.4.0-23-generic (4.4.0-23.41), using nvidia-364 (364.19-0ubuntu0~gpu16.04.3). Would be very useful / good for battery performance if the nvidia card would be turned off by default. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1569383 Title: Intel HD Graphics 530 crashes on glxinfo in MSHYBRID mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1569383/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
