I have seen this same problem affect a VMware VM running on paravirtualized hardware. Removing the intel-microcode package and regenerating the initramfs fixed the problem.
The root filesystem for these machines is btrfs. I suspect, however, that this may be a red herring; other machines with an identical configuration have worked elsewhere on a range of desktop hardware, so I suspect the problem may be isolated to a subset of machines, e.g. those with a particular CPU revision. /proc/cpuinfo on the virtualized machine I seen this problem on reads as follows: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz stepping : 4 microcode : 0x427 cpu MHz : 2200.000 cache size : 25600 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm epb fsgsbase smep dtherm ida arat pln pts bugs : bogomips : 4400.00 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1557989 Title: having btrfs installed as the fs is causing a crash when trying to install the intel-microcode package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1557989/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
