I have a MacBook Pro and only use Ubuntu on it. I just upgraded from 18.04 to 20.04.
Now when I start the computer it says:
Failed to Set MokListRT: Invalid Parameter
Could not create mokListRT: Invalid Parameter
Importing MOK states has failed: import_mok_state() failed: Invalid Parameter
Continuing boot since secure mode is disabled.
Does anyone know EXACTLY how I can fix this?? Step-by-step process I don't want to mess anything up trying to fix this.
I have installed Ubuntu 18.04 on my mid-2009 MacBook Pro, however, I am unable to even search for a wireless internet connection.
I have searched past question from this site and askubuntu re; no wi-fi adapter found, and found they either refer to past versions of Ubuntu or their implementation strategies (e.g. sudo update) does not to MacBooks or don’t work because they rely on internet connection that I do not have (e.g. sudo...reinstall kernel source).
I have scoured the web, and I can't seem to get Xmodmap / anything to work properly. I want to swap BOTH my Command keys with my Control key - in essence, inverting what they do currently.
How would I do that?
I tried xmodmap -e "keycode 133 = Control_L" and corresponding commands for keycodes 134 (right command) and 37 (control left). I even tried these commands, plus xmodmap -pke > ~/.Xmodmap and xmodmap ~/.Xmodmap in .xinitrc.
My end goal is I want HUD / Dash to come up when I click control and command to functional control, i.e., control-v is a commond shortcut to paste, i would click command-v
I have that problem which seemingly afflicts many using the proprietary Nvidia driver:
Video tearing: fine horizontal lines (usually near the top of my display) when there is a lot of panning or action in the video.
(Note: switching back to the default nouveau driver is not an option, as its seemingly nonexistent power-management drains my battery several times faster)
I've tried Totem, Parole, and VLC, and tearing occurs with all of them. The best result has been to use X11 output in VLC, but there is still tearing with relatively moderate action.
Hardware: MacBook Air 3,2 -- which has an Nvidia GeForce 320M.
There are two common fixes for tearing with Nvidia prop drivers:
Turn off compositing, since Nvidia proprietary drivers don't usually play nice with compositing window managers on Linux (Compiz is an exception I'm aware of). But I use an extremely lightweight window manager (Awesome window manager) which is not even capable of compositing (or any cool effects). I also have this problem in Xfce, where I have compositing disabled.
Enabling sync to VBlank. To enable this, I set the option in nvidia-settings and then autostart it as nvidia-settings -l with my other autostart programs. This seems to work, because when I run glxgears, I get:
$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
303 frames in 5.0 seconds = 60.500 FPS
300 frames in 5.0 seconds = 59.992 FPS
And when I check the refresh rate using nvidia-settings:
$ nvidia-settings -q RefreshRate
Attribute 'RefreshRate' (wampum:0.0; display device: DFP-2): 60.00 Hz.
All this suggests sync to VBlank is enabled. As I understand it, this is precisely designed to stop tearing, and a lot of people's problem is even getting something like glxgears to output the correct info. I don't understand why it's not working for me.
xorg.conf: http://paste.ubuntu.com/992056/
Example of observed tearing:: 
http://cdimage.ubuntu.com/releases/11.04/release/
At that location there is an ISO image which is described as "This image is adjusted to work properly on Mac systems."
What specific problems on the Mac does this image address that the standard images don't? I ask because I need to know which ISO to recommend to Apple Mac users.