Same problem here on Ubuntu 20.04 in a Dell Latitude E7470 with a Core i5-6300U. The machine hangs on boot. I can not even reboot the machine using the alt-prtsc-b. It was completely frozen. Only a long press on the power button would work. My workaround was to boot into recovery mode (maybe you a need an older kernel for that) and do a
apt --purge remove intel-microcode The purging process rebuilds initramfs. After that I could reboot again. Here is the output asked above. pjssilva@trinity:~$ dmesg | grep microcode [ 0.102417] SRBDS: Vulnerable: No microcode [ 0.578849] microcode: sig=0x406e3, pf=0x80, revision=0xcc [ 0.578971] microcode: Microcode Update Driver: v2.2. This looks like a serious bug. Maybe pull out the update from the repositories until a solution is found? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882890 Title: intel-ucode/06-4e-03 from release 20200609 hangs system in early boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1882890/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
