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Add nouveau disable instructions

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Kewde 2016-09-15 18:07:58 +00:00 committed by GitHub
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troubleshooting/nvidia-troubleshooting.md
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@ -71,3 +71,70 @@ If you see a terminal window in the top left corner, it means you most likely su
1. Reboot and let the system boot from the normal boot configuration. You should be able to use X under Xen now.
Disabling Nouveau
---------------------
If Qubes fails to properly boot after the GRUB Boot menu and displays messages starting with `nouveau` then it means that the nouveau driver failed to launch properly.
One way to get rid of it is by disabling nouveau.
Example error
~~~
nouveau E[ PGRAPH][0000:01:00.0] grctx template channel unload timeout
nouveau E[ PGRAPH][0000:01:00.0] failed to construct context
nouveau E[ PGRAPH][0000:01:00.0] init failed, -16
~~~
0. In the case that you only have an external monitor it is advised to hook it up to the connector directly connected to the motherboard if it is present.
1. Verify that that GRUB Boot Menu is displaying, you should be presented with two options and a progressbar/timer than goes rather fast.
~~~
Qubes
Qubes with advanced Xen options
~~~
2. Quickly press the "E" key before the time is up.
3. An editor will open up that will allow you to temporarily change the grub options for the next boot.
4. Press the down arrow key and move the cursor to the line after the line with the kernel options. The line with the kernel options might look something like, I didn't type everything as it may differ from system to system but it should look something like this:
~~~
module /vmlinux-4.1.13-9.pvops.qubes.x86_64 placeholder root=/dev/mapper/qubes_dom0-root ro ... rhgb quiet
~~~
Please note: chose the module that starts with `vmlinux`!
5. Press the left/right arrow keys to position the cursor at the end of kernel options line, after `rhgb quiet` in this case.
6. Add the following:
~~~
nouveau.modeset=0 rd.driver.blacklist=nouveau video=vesa:off
~~~
This will tempororarily disable nouveau until boot.
7. Press either the F10 key or Ctrl+X to start the boot process.
Qubes should now boot properly, if that's the case then we should make this change permanent such that the GRUB config knows to not run nouveau.
To make this change persistent, so your boot will always work properly you'll have to do the following
1. Open a terminal (do this vb clicking on Q > 'run command' > type 'terminal' and hit enter)
2. type following commands:
~~~
cd /etc/default/
sudo nano grub
~~~
3. Edit `GRUB_CMDLINE_LINUX`, add the following to it at the end:
~~~
nouveau.modeset=0 rd.driver.blacklist=nouveau video=vesa:off
~~~
4. ctrl + X and then y to save the file.
5. The final step is to compile the configuration file to something the bootloader can read.
~~~
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
~~~