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Macbook Pro 8,3 with Cosmic

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I successfully got Ubuntu installed on my old 8,3.
Firstly, there are no instructions on https://wiki.ubuntu.com/MactelSupportTeam for this combination. I thought that I could write something but I have neither the permissions or enough posts to do anything about it.
For the benefit of others this is how I did it.

1. My DVD drive wasn't working so I bought a caddy and put a second drive in it. So I have OSX on the normal drive and Ubuntu on the other. I can use the Option key when I hear the boot up noise to choose which one.

2. I used the ubuntu server ISO image

3. As it boots I hit the E key to edit the boot up options.
I changed
Code:

set gfxpayload=keep
to
Code:

set gfxpayload=text
I changed
Code:

linux /casper/vmlinuz boot=casper quiet ---
to
Code:

linux /casper/vmlinuz boot=casper adeon.modeset=0 i915.modeset=1 i915.lvds_channel_mode=2 ---
Hit F10 to boot

4. After installation I connected to Ethernet and rebooted

5. When ubuntu comes up you can't see the screen, so I found the IP address of the Macbook in my routers DHCP table and ssh into it.

6. Edit /etc/grub.d/10_linux
add these lines
Code:

echo "    outb 0x728 1" | sed "s/^/$submenu_indentation/"
echo "    outb 0x710 2" | sed "s/^/$submenu_indentation/"
echo "    outb 0x740 2" | sed "s/^/$submenu_indentation/"
echo "    outb 0x750 0" | sed "s/^/$submenu_indentation/"

before the line that says echo " insmod gzio" | sed "s/^/$submenu_indentation/"

These lines disable the GPU so from now on only the HD3000 graphics built into the processor will work (which is what I want)

run
Code:

update-grub
reboot


7. Install the GUI that you like, in my case that's
Code:

apt-get update
apt-get upgrade
apt-get install lxqt xinit

But most people will probably prefer a more conventional window manager than LXQT, but I really like it.

to get wifi working
Code:

apt-get install firmware-b43-installer
I still need to tune my installation. Problems still to solve
Can't adjust baclight brightness.
Keyboard doesn't illuminate
Can't right click on the mouse pad.

Anyway I think that there are solutions to all of these things; I just need to google and experiment

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