Adrian, thank you very much. Your advice saved me a lot of money.
I unfortunately own an MSI GX70 notebook with two GPUS: Radeon HD 8650 G
Richland and Radeon HA 8970 G Neptune.
It wouldn't load without nomodest option in grub configuration. While
fglrx lasted, it was bearable. After 16.04, however, nomodeset started
to block installing amdgpu driver.
With MUTTER_ALLOW_HYBRID_GPUS=1, however, the notebook booted without
nomodeset, also it switched to integrated Radeon HD 8650 G Richland
automatically.
I will still have to figure out how to switch to the discrete GPU when
it is required but the notebook is already getting to be usable again
after one and a half years.
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https://bugs.launchpad.net/bugs/1724583
Title:
gdm3 in Ubuntu 17.10 doesn't list wayland sessions when using hybrid
graphics
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