Can't switch back to intel(black screen)

[askannz]

Can't switch back to intel(black screen)

[Askannz]

first after booting up with nvidia resolution changed everything get bigger.

Not sure if I understand your problem correctly, but try removing /etc/X11/xorg.conf if it exists. It is autogenerated by nvidia-xconfig but filled with outdated stuff and can cause the X server to start in low resolution.

For your second problem, I'm aware of the issue, but haven't found a proper fix for it yet. In the meantime, you can try setting the power management method to bbswitch or disabling modesetting in Intel mode.

[Askannz]

Do you still have the issue ?

[Ahuri3]

I am having issues switching back. It seems a bit random but I can give some info. I'm not sure I have the same issue @Meshikhah is having but the ticket is so aptly named and he hasn't given much information.

Description of the issue :

When I boot I am in Intel mode and all works well. Here is the xorg log file :
no-problem-intel.xorg.log

I can try to switch to nvidia and it works (not every single time but usually). Here is the xorg log file of :
no-problem-nvidia.xorg.log

Once I am in nvidia mode and I try to switch back I get an issue : GDM load fine but after I try to login Xorg crashes and I am sent back to the login screen on GDM.

Here is the Xorg log file :
problem-intel-xorg.log

An excerp from the log file :

[   221.869] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[   221.869] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[   221.869] (EE) open /dev/dri/card0: Permission denied
[   221.869] (WW) Falling back to old probe method for modesetting
[   221.869] (EE) open /dev/dri/card0: Permission denied
[   221.869] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[   221.869] (EE) Screen 0 deleted because of no matching config section.
[   221.869] (II) UnloadModule: "modesetting"
[   221.869] (EE) Device(s) detected, but none match those in the config file.
[   221.869] (EE) 
Fatal server error:
[   221.870] (EE) no screens found(EE) 
[   221.870] (EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[   221.870] (EE) Please also check the log file at "/home/lferlin/.local/share/xorg/Xorg.1.log" for additional information.
[   221.870] (EE) 
[   222.378] (EE) Server terminated with error (1). Closing log file.

No the interesting part : If I switch tty and connect via terminal I can fix the situation by running optimus-manager --switch intel a second time. After the second switching attempt it seems to work flawlessly. Here are the last Xorg log file :
again-no-problem.log

General informations :

First of all here is my optimus configuration :
optimus-manager.conf.txt

I have a laptop with an Intel Core i7-8750H and a GTX 1070 Max-Q
The drivers I use for nvidia are :

pacman -Q | grep nvidia 
lib32-nvidia-utils 415.27-1
nvidia 415.27-7
nvidia-settings 415.27-1
nvidia-utils 415.27-1

And for Intel :

vulkan-intel 18.3.3-2
xf86-video-intel 1:2.99.917+859+g33ee0c3b-1
lib32-mesa 18.3.3-1
mesa 18.3.3-2

My xorg version is xorg-server 1.20.3-1
I use gnome and GDM :

gdm 3.30.2-2
libgdm 3.30.2-2

I am on the aur package of optimus-manager (v 0.7) :

optimus-manager 0.7.1-1

I had to forbid GDM from using Wayland to get the switching to work.

I also set the intel driver mode to intel instead of modeseting because it was causing a lot of errors in the Xorg.X.log files (flip queue failed: Invalid argument).

Finally I used to use bumblebee and it worked fine. I disable the service and remove the package before trying to use optimus-manager.

Regards,

Leo

[Askannz]

Could you test the latest Git version and see if the problem persists ?
This version introduces some major changes to the way optimus-manager works, so you need to reboot after upgrading to make sure everything is reloaded up properly.

[Ahuri3]

I hadn't tried it since I made the comment, but I just tried and it worked !

Thank you so much !

[Askannz]

Great ! :)