Hmm, I experimented with this a bit more, and found something interesting. What about the following set of symptoms on the exact same machine with a _slightly_ tweaked BIOS configuration: - In BIOS, I set the Internal HDD as 1st in the boot priority - The status-quo is the same: whenever I reboot either from Win8 or Ubuntu I end up booting Win8 by default (with no GRUB menu involved)
- Now I shutdown the laptop, plug an Xubuntu LiveUSB, hit the Assist button to enter in Maintenance mode, select F11 to boot from external USB device - I get the GRUB menu of the LiveUSB, and then I 'reboot' from the GRUB console (and I remove the LiveUSB) - Immediately afterwards I get the laptop's (/dev/sda) GRUB menu - In GRUB I can select Ubuntu or Win8, and both load fine Now this is the interesting part: - If I load Ubuntu from GRUB, then it loads Ubuntu - On `reboot` from within Ubuntu, it still loads the GRUB menu where I can select Ubuntu (no more boot to Win8 by default) - This is persistent as long as I keep rebooting to Ubuntu (!) - `efibootmgr` reports the following: BootCurrent: 0001 Timeout: 5 seconds BootOrder: 0001,0000,2001 Boot0000* Windows Boot Manager Boot0001* Ubuntu Boot2001* EFI USB Device - However, if I choose just one single time Win8 from the GRUB menu, then on restart I once again keep booting by default to Win8 with no GRUB menu involved (the initial status-quo). - After booting Win8 and then rebooting to Ubuntu via the 'shift + restart' trick (see 1st post), then `efibootmgr` reports the following: BootCurrent: 0001 Timeout: 5 seconds BootOrder: 0002,0001,2001 Boot0001* Ubuntu Boot0002* Windows Boot Manager Boot2001* EFI USB Device The symptoms that I describe here are very similar to those reported in this SuperUser question: http://superuser.com/questions/587854/every-windows-8-boot-breaks-grub (concerning an Asus machine, though). Is this more evidence of trouble with the Sony Vaio firmware? Is it possible that the firmware is writing to the EFI partition? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314759 Title: Issues with dual-booting Windows 8 and Ubuntu 14.04 on a Sony Vaio laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/efibootmgr/+bug/1314759/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
