** Also affects: grub2 (Ubuntu Bionic) Importance: Undecided Status: New
** Also affects: grub2 (Ubuntu Cosmic) Importance: Undecided Status: New ** Also affects: grub2 (Ubuntu Xenial) Importance: Undecided Status: New ** Also affects: grub2 (Ubuntu Trusty) Importance: Undecided Status: New -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1785033 Title: GRUB needs to support 64-bit efi linear frame buffer address Status in grub2 package in Ubuntu: New Status in grub2 source package in Trusty: New Status in grub2 source package in Xenial: New Status in grub2 source package in Bionic: New Status in grub2 source package in Cosmic: New Bug description: [Rationale] More firmwares support above 4G mmio configureation and the EFI Graphics Output Protocol can return a 64-bit linear frame buffer address have been implemented in some firmware/BIOS. Grub2 currently only pass 32-bit framebuffer base to kernel. The Linux kernel has already added support to handle 64-bit linear framebuffer address in the efifb driver now. So GRUB2 should support 64-bit EFI linear frame buffer address. [Impact] Some machines block booting with firmware/bios implemented 64-bit EFI linear frame buffer address,due to Grub passing incorrect(only 32-bit) EFI linear frame buffer. [Test cases] Need Bios/Firmware support, 1) Make sure the machine with the Bios implemented 64-bit EFI linear frame buffer address. some machine need to enable above 4G mmio on bios setup menu. 2) Boot up. [Solution] A patch has been committed and accepted by maintainer http://git.savannah.gnu.org/cgit/grub.git/commit/?id=886edba8770ccbc3def0af2a7d6b346d00d0af2f [Regression Potential] Minimal, it's unlikely completing the whole framebuffer address will affect those which hasn't used above 32-bits framebuffer address. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1785033/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : group.of.nepali.translators@lists.launchpad.net Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp