In Fedora 16 we changed to using GPT as the default disklabel for new installs. In a few cases, mostly limited to Lenovo hardware, we found that some BIOS's would not boot from GPT. We blacklisted Lenovo, falling back to msdos labels in order to solve this. Thanks to Matthew Garrett we found that switching on the boot flag of the GPT's protective MBR these BIOS's would then boot from GPT. Matthew wrote a patch for parted to allow controlling this flag using the disk_set pmbr_boot command in parted. This is in parted-3.0-7 In anaconda-17.6 I have reverted the Lenovo blacklist and changed things so that pmbr_boot is always set on GPT labeled installs. This should ensure that thing boot correctly. If this still causes problems the symptom will be that grub never starts and the bios may complain about not being able to find an OS. If you have problems with this please open a bug with the output from dmidecode You can still force usage of msdos partitions by passing nogpt on the kernel cmdline. -- Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)
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