Created attachment 959268 [details] virt settings How reproducible: 100% Steps to Reproduce: 1. Install Fedora 21 daily build from live USB, with virtualization disabled 2. BIOS > Security > enable virtualization (attached) Actual results: Doesn't boot anymore. Shows a message which is shown with virtualization disabled too. Expected results: Boot Additional info: cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3720QM CPU @ 2.60GHz stepping : 9 microcode : 0x1b cpu MHz : 1202.601 cache size : 6144 KB physical id : 0 siblings : 8 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 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 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt bugs : bogomips : 5188.42 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 (repeats 6 times)
Created attachment 959269 [details] boot screen stuck
Created attachment 959270 [details] boot stuck -- text mode
It does boot with 1st option, virtualization, enabled. Enabling the 2nd, VT-D, causes freeze while boot (see screenshot).
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There are a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs. Fedora 21 has now been rebased to 3.18.3-201.fc21. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you experience different issues, please open a new bug report for those.
Its a known bug (probably in Lenovo's BIOS) that VT-D conflicts with the "discrete graphics" BIOS setting on the W530. You can boot with VT-D enabled if the integrated graphics is selected, and you can boot with discrete graphics if VT-D is disabled. If that is not what you meant then please clarify on the graphics BIOS setting.
Thanks Volker, I'll give it a shot! Feel free to close this bug if the cause isn't in the kernel.
Closing based on latest discussion.