This bug was fixed in the package grub2 - 2.04-1ubuntu28 --------------- grub2 (2.04-1ubuntu28) groovy; urgency=medium
* Ensure that grub-multi-install can always find templates (LP: #1879948) * Fix changelog entries for security update -- Julian Andres Klode <[email protected]> Mon, 10 Aug 2020 15:07:29 +0200 ** Changed in: grub2 (Ubuntu Groovy) Status: In Progress => Fix Released -- 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/1831789 Title: Add "dis_ucode_ldr" to linux boot options for Recovery Mode Status in grub2 package in Ubuntu: Fix Released Status in grub2 source package in Xenial: New Status in grub2 source package in Bionic: New Status in grub2 source package in Focal: In Progress Status in grub2 source package in Groovy: Fix Released Bug description: Due to some recent problems with a microcode update which broke booting of some laptops I suggest adding "dis_ucode_ldr" to recovery mode boot options to allow booting after a bad microcode update. See the following topics that describe the problems: - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829620 - https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/1 When such problems occur it's very hard to see that the microcode loading is the issue, the booting just hangs at the purple screen, even removing "quiet splash" or using the recovery option will not show the error. We'll need to double check that dis_ucode_ldr works as expected across all architectures. According to the kernel docs (Documentation/admin-guide/kernel-parameters.txt), dis_ucode_ldr is x86 only, so my guess is that it will be ignored for other architectures. According to the kernel code (arch/x86/kernel/cpu/microcode/core.c), dis_ucode_ldr works for both AMD and Intel. I have some time tomorrow on test this on a ARM device. This was also discussed Ubuntu Developer mailing list where it was suggested to post this here, see: https://lists.ubuntu.com/archives /ubuntu-devel/2019-June/040725.html To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1831789/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : [email protected] Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
