On Mon, Feb 06, 2012 at 04:54:01PM -0800, Adam Williamson wrote: > On Mon, 2012-02-06 at 23:19 +0000, Pádraig Brady wrote: > > On 02/06/2012 10:40 PM, Brian C. Lane wrote: > > > 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. > > > > Hmm, I tried that workaround I think on my Lenovo T520 with BIOS 1.29, > > and it didn't help. I.E. point (1.) from the link referenced here: > > https://bugzilla.redhat.com/show_bug.cgi?id=735733#c31 > > > > Fingers crossed I just missed something at the time. > > I'll try out again tomorrow maybe. > > Yes, I remember that. Please do test the change out and let us know the > results, we'd definitely like to know. > > Brian, this change takes effect from Alpha TC2 (whenever we spin it), > it's not in Alpha TC1, correct? Correct. -- Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)
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