I finally solved it by inserting intel-ucode.img (taken from archlinux-2017.10.01-x86_64.iso) as the first initrd in grub.cfg. This updates the microcode very early in the boot process. I tried this with the kernel delivered with Ubuntu 17.10 (4.13.0-generic). So updating linux-firmware is the resolution. This also solves this bug: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1724650
But I found that WiFi is unstable after like 10 mins it gets disconnected and does not see any network anymore. Time for another bug. And when I used a new kernel image (4.14-rc6) and insterted belonging modules into initrd then "(initramfs) unable to find a medium containing a live file system." Oh well.
I finally solved it by inserting intel-ucode.img (taken from archlinux- 2017.10. 01-x86_ 64.iso) as the first initrd in grub.cfg. This updates the microcode very early in the boot process. I tried this with the kernel delivered with Ubuntu 17.10 (4.13.0-generic). So updating linux-firmware is the resolution. This also solves this bug: https:/ /bugs.launchpad .net/ubuntu/ +source/ intel-microcode /+bug/1724650
But I found that WiFi is unstable after like 10 mins it gets disconnected and does not see any network anymore. Time for another bug. And when I used a new kernel image (4.14-rc6) and insterted belonging modules into initrd then "(initramfs) unable to find a medium containing a live file system." Oh well.