Comment 3 for bug 1370352

Please revert the 2.20140913.1ubuntu1 upload.

After loading the new microcode lots of processes die with
[ 43.611507] traps: systemd[1] trap invalid opcode ip:7f844f84a7ab sp:7fff2ccf7e28 error:0 in libpthread-2.19.so[7f844f839000+18000]
[ 44.201798] traps: dbus-daemon[1277] trap invalid opcode ip:7f848d2f67ab sp:7fff8f3c3bb8 error:0 in libpthread-2.19.so[7f848d2e5000+18000]
[ 44.202077] traps: systemd-logind[1287] trap invalid opcode ip:7f8c4bf887ab sp:7fff58f13178 error:0 in libpthread-2.19.so[7f8c4bf77000+18000
[ 44.202101] traps: thermald[1269] trap invalid opcode ip:7fdf60f0c7ab sp:7fffa55068e8 error:0 in libpthread-2.19.so[7fdf60efb000+18000]

It's fine after a reboot so it seems to be a problem with upgrading from the 2.20140624.1ubuntu1 microcode to 2.20140913.1ubuntu1.

% cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
stepping : 3
microcode : 0x1c
cpu MHz : 800.000
cache size : 6144 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
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 acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid
bogomips : 6385.61
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
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