Windows 10 fails to start if multiple CPU's are enabled (IA32_TSC_AUX)

[MOK]

On Intel Celeron (J1900) windows startup fails if I enable more than one cpu. Virtual machine starts, shows windows boot logo and nothing more happens. If I switch back to one cpu, startup works as normal - but it is desireable to give more power to the guest.

Current setup is: IO-APIC 1 Processor / 100% / PAE Hyper-V + VT-x + Nested Paging

Mem: 3500MB

graphics: 128MB / 3D / 2D

I already tried various settings on disabling 2D/3D, virtualisation features like Hyper-V (to none, minimal)

[MOK]

log with 1 cpu

[Frank Mehnert]

The reason could be: Matched host CPU INTEL 0x6/0x37/0x8 Intel_Atom_Silvermont with CPU DB entry 'Intel Atom 330 1.60GHz' (INTEL 0x6/0x1c/0x2 Intel_Atom_Bonnell)

[CosC]

I have the same problem, but on Windows host.

CPU: Intel Celeron N2930 quad core 2 GHz. RAM: 4 GB VirtualBox version: 5.0.14 Host OS: Windows 8.1 x64 Guest OS: Windows 10 Pro x64

Same solution: only 1 processor.

If you think I should start a new ticket and/or if you want the logs, just let me know. Anyway, with so many tutorials on internet on how to install W10 in VB, I noticed there are quite a few users with the same problem (not just me or MOK). And this problem was reported 2 months ago...

[Frank Mehnert]

CosC, please attach the VBox.log file of such a VM session. And please test with VBox 5.0.16.

[dasdandre]

Logfile- Windows 10 starting up fine with 1 CPU.

[dasdandre]

Windows 10 with 2 CPUs stuck at bootlogo. (Stucking starts at Line 1090)

[dasdandre]

Same Problem here. Tested with 5.0.16. Windows installed fine with one CPU assigned. Changing to more than one CPU i'm getting stuck at the boot logo.

Linux:

# uname -a
Linux homeserver 4.2.0-34-generic #39-Ubuntu SMP Thu Mar 10 22:13:01 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Virtualbox:

# vboxmanage -v
5.0.16r105871

CPU Info (some kind of simmilar to CosC):

# lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    1
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 76
Model name:            Intel(R) Celeron(R) CPU  N3150  @ 1.60GHz
Stepping:              3
CPU MHz:               2165.865
CPU max MHz:           2165,8000
CPU min MHz:           499,8000
BogoMIPS:              3198.65
Virtualization:        VT-x
L1d cache:             24K
L1i cache:             32K
L2 cache:              1024K
NUMA node0 CPU(s):     0-3

I've added two log files. The guest locks at Line 1090 (using 2 CPUs). Hopefully this information will help to solve the problem.

[Frank Mehnert]

Could you check if this test build fixes your problem? The reason was most likely the access to the IA32_AUX_TSC MSR.

[dasdandre]

Thank you very much frank.

In the meantime I switched to Ubuntu 16.04, so i had some troubles to get your build running.

But at least I can confirm that the problem is fixed. :-)

[Frank Mehnert]

Thanks for the feedback! Here is a Ubuntu 16.04 test build.

[Frank Mehnert]

Fixed in 5.0.22.