On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula <jani.nikula at linux.intel.com> wrote: > I've never used the acpi_osi= kernel parameter, but it looks like you > could workaround this with acpi_osi="!Windows 2012". Please check that > running the "bad" kernel. I find out that I just can't set the acpi_osi="!Windows 2012" properly in grub2.cfg. Grub2 will second guess the quote and change it. So it end up Linux kernel will see "acpi_osi=!Windows\x202012" or some thing like that. However, I just find out that if I set acpi_osi=Linux the black screen will go away. That is one usable work around on the stock fedora kernel. Chris
