Hey, I'm the OP, I can confirm @felix-ticona 's finding, after the kernel upgrade (atleast HWE to the -21 revision and the issue is "magically" done).
# uname -a Linux xxx 4.18.0-21-generic #22~18.04.1-Ubuntu SMP Thu May 16 15:07:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux # dmesg | grep command [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-4.18.0-21-generic root=UUID=xxx ro rootflags=subvol=@ubuntu ro kaslr resume=xxx mem_sleep_default=deep dm_mod.use_blk_mq=1 acpi_osi=Linux acpi_backlight=vendor quiet Notice no dis_ucode_ldr (=no workaround 1) # apt-cache policy intel-microcode intel-microcode: Installed: 3.20190514.0ubuntu0.18.04.3 Candidate: 3.20190514.0ubuntu0.18.04.3 Version table: *** 3.20190514.0ubuntu0.18.04.3 500 500 mirror://mirrors.ubuntu.com/mirrors.txt bionic-security/main amd64 Packages 500 mirror://mirrors.ubuntu.com/mirrors.txt bionic-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.20180312.0~ubuntu18.04.1 500 500 mirror://mirrors.ubuntu.com/mirrors.txt bionic/main amd64 Packages (=no workaround 2: old intel-microcode package holding) TODO: test main kernel (4.15) and hwe-edge (5.0) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829620 Title: intel-microcode on ASUS makes kernel stuck during loading initramfs on bionic-updates, bionic-security To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1829620/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
