It looks like microcode update revision 0xd6 is still the officially shipped version.
The often occurring hangs without the power cable plugged in, are still happening. Booting with `maxcpus=1` and adding earlyprintk=efi earlycon=efifb debug to the Linux command, the last messages are: […] random: crng done (trusting CPU's manufacturer) Console: colour dummy device 80x25 printk: console [tty0] enabled printk: bootconsole [efifb0] disabled So, it might indeed be related to bug 1862751. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883065 Title: Dell Latitude/Precision, sig=0x806ec/20090609: Linux hangs without plugged in power cable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1883065/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs