It turns out that if I use the kernel from the PPA which has KMS enabled by default, my system boots fine with KMS. If I use the default kernel which has KMS disabled by default, and change the boot manager accordingly, it won't work and I get the messages above.
It turns out that if I use the kernel from the PPA which has KMS enabled by default, my system boots fine with KMS. If I use the default kernel which has KMS disabled by default, and change the boot manager accordingly, it won't work and I get the messages above.