This bug was fixed in the package intel-microcode - 3.20200609.0ubuntu0.20.04.1
--------------- intel-microcode (3.20200609.0ubuntu0.20.04.1) focal-security; urgency=medium * REGRESSION UPDATE: some CPUs in the Skylake family sig=0x406e3 fail to boot (LP: #1882890). - revert 06-4e-03/0x000406e3 microcode from 0x00dc to 0x00d6 sig 0x000406e3, pf_mask 0xc0, 2019-10-03, rev 0x00d6, size 101376 -- Steve Beattie <sbeat...@ubuntu.com> Wed, 10 Jun 2020 08:34:20 -0700 ** Changed in: intel-microcode (Ubuntu Focal) Status: Confirmed => Fix Released ** Changed in: intel-microcode (Ubuntu Bionic) Status: Confirmed => 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/1882890 Title: intel-ucode/06-4e-03 from release 20200609 hangs system in early boot Status in intel-microcode package in Ubuntu: Confirmed Status in intel-microcode source package in Xenial: Confirmed Status in intel-microcode source package in Bionic: Fix Released Status in intel-microcode source package in Eoan: Confirmed Status in intel-microcode source package in Focal: Fix Released Bug description: Hi, This morning I applied the latest updates on my Ubuntu 16.04 (kernel 4.15.0-106-generic + intel-microcode 3.20200609.0ubuntu0.16.04.0) and rebooted as usual to boot on the new kernel but the system won't boot: black screen. I tried booting the previous kernel 4.15.0-101 and it seems to be the same : in grub I select the 4.15.0-101 kernel, press enter, a message "Loading initrd..." is printed but nothing else happens. Tried even older kenrel 4.4.0-184-generic : same problem, "Loading initrd...", and nothing happens. I managed to boot a 4.4.0-142-generic, but bluetooth and wifi are non- functionnal. I mounted the /boot partition from a USB rescue drive, and it seems that all the initrd images that got updated this morning are not bootable anymore : - initrd.img-4.15.0-106-generic - initrd.img-4.15.0.101-generic - initrd.img-4.4.0-184-generic I tried regenerating the images with update-initramfs but it's the same : "Loading initrd" message but nothing happens. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1882890/+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