switching graphics cards arch linux macbook pro

Mobo: Apple model: Mac-F221BEC8 serial: UEFI: Apple v: 00.1806081708ĬPU: Topology: 2x 6-Core model: Intel Xeon X5690 bits: 64 type: MT MCP SMP arch: Nehalem rev: 2įlags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 166002 Machine: Type: Desktop System: Apple product: MacPro5,1 v: 0.0 serial: Chassis: type: 7 Wm: muffin 5.2.0 dm: LightDM 1.30.0 Distro: Linux Mint 20.3 Una base: Ubuntu 20.04 focal The Mac is set to dual boot between LM20.3 and macOS 10.13 High Sierra. My hope was to boot with the HD5770, then push a button on the KVM to switch to the RX580. I'm using 2 sets of ports for the mac pro - one for the HD5770 and the other for the rx580. Right now I am using a KVM to share a devices with a couple machines. Is there any way to tell linux to switch the video to the other card? Maybe it doesn't really matter, as I am primarily interested in using the RX580 accelerating modeling using openCL. I'm guessing that linux is not detecting that the RX580 now has a display, so it doesn't get activated. When I boot with the monitor plugged into the HD5770 - everything works great.Īfter booting, if i then switch the monitor the RX580 - no video. When I boot with the monitor plugged into the RX580 - nothing happens, machine won't boot, or does part way and then dies.

Both cards are recognized, and I believe drivers loaded. Right now the system only boots when the monitor is plugged into the HD5770, not the RX580.

I'm running LM20.3, kernel 5.4.0-97, which I believe is the up to date LTS kernel. It has two video cards, an 'Apple' AMD HD5770 (came from Apple, WILL display the Mac boot screen) and an AMD RX580, which has not been flashed (and can't be?) for Mac. I am trying to set up Mint 20 on a Mac Pro 5,1.

Switching graphics cards arch linux macbook pro