Comment 0 for bug 2042850

This is a public version of https://bugs.launchpad.net/bugs/2042423
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Starting in 6.5.0-6.6, the BMC output on machines with Aspeed 2600 rev 52 GPUs stopped working. The machines boot find if "nomodeset" is set, but without "nomodeset", the machine does not boot to the prompt.

This was introduced by upstream commit: f81bb0ac7872893241319ea82504956676ef02fd

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/ast?id=f81bb0ac7872893241319ea82504956676ef02fd

Until this has been fixed upstream, we need to revert this change.