Comment 383 for bug 272247

sergiom99,

Arch Linux does NOT have custom DSDT support, because the kernel itself dropped support for the patch upstream as it was very 'hackish', and breaks every two releases or something, and as a result Arch Linux dropped support for it as well. So, that means that Ubuntu and Arch Linux and most other distros will not have custom DSDT support , unless the explicitly add it themselves (you mentioned OpenSUSE did....)

I read that the kernel developers would much rather have people submit kernel.org bug reports saying that their DSDT is faulty and have fixes/workarounds for buggy DSDTs rather then have support for actually loading custom DSDT files, as that way, the fix effects a wider number of people, rather then the very small number who are even aware of the whole 'buddy DSDT ' problem.