Opened 10 years ago
Closed 10 years ago
#12645 closed defect (worksforme)
Windows 8.1 X64 Can't allocate more than 3584 MB to any guest OS.
| Reported by: | c0mputerguy72 | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 4.3.6 |
| Keywords: | Cc: | ||
| Guest type: | all | Host type: | Windows |
Description
When running any guest with above 3584 MB allocated I receive the following error.
Error received:
"Failed to open a session for the virtual machine WIN701.
VT-x is disabled in the BIOS. (VERR_VMX_MSR_VMXON_DISABLED).
Result Code: E_FAIL (0x80004005)
Component: Console
Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}"
When I allocate below 3585 MB the guest Boots.
VT-x has been confirmed to be enabled in the BIOS.
System Info from Virtual Box Log:
00:00:00.001995 main Build Type: release
00:00:00.001995 main OS Product: Windows 8
00:00:00.001995 main OS Release: 6.2.9200
00:00:00.001995 main OS Service Pack:
00:00:00.017016 main DMI Product Name: 4318CTO
00:00:00.023970 main DMI Product Version: ThinkPad W510
00:00:00.023970 main Host RAM: 16315MB total, 13280MB available
00:00:00.023970 main Executable: C:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.023970 main Process ID: 6512
00:00:00.023970 main Package type: WINDOWS_64BITS_GENERIC
This has been tested on multiple machines with different installs and is not machine specific.
Virtual Box Log Attached.
Attachments (2)
Change History (12)
by , 10 years ago
comment:1 by , 10 years ago
| priority: | blocker → major |
|---|
comment:2 by , 10 years ago
| Resolution: | → worksforme |
|---|---|
| Status: | new → closed |
comment:3 by , 10 years ago
VT-x is enabled and has been confirmed. Recently the laptop had Ubuntu X64 12.04 installed. The VT-x setting was not changed. I have also confirmed that Hyper-V is not enabled either. After installing Windows 8.1 X64 on the same laptop the issue reared its ugly head.
comment:4 by , 10 years ago
| Resolution: | worksforme |
|---|---|
| Status: | closed → reopened |
VT-x is enabled and has been confirmed. Recently the laptop had Ubuntu X64 12.04 installed. The VT-x setting was not changed. I have also confirmed that Hyper-V is not enabled either. After installing Windows 8.1 X64 on the same laptop the issue reared its ugly head.
comment:5 by , 10 years ago
What do you mean by "VT-x is enabled and has been confirmed"? How do you confirm that VT-x is enabled? Please attach a VBox.log file from a VM session where you select less than 3.5GB guest memory.
by , 10 years ago
| Attachment: | VBox-Latest.log added |
|---|
comment:6 by , 10 years ago
The problem has been replicated on two laptops (ASUS and Lenovo). Both with VT-x enabled although as in the VBox log Virtual Box says it can't see it, "CPU does NOT support HW virtualization." Log is attached. Thank you for looking into it.
comment:7 by , 10 years ago
The log file clearly says that VT-x is disabled in the BIOS. Please double-check the BIOS settings.
comment:8 by , 10 years ago
Frank..... I am sooo sorry and apologize for wasting your time. The VT-x was enabled and confirmed. What was causing the error was "trusted execution" was enabled under the Security section. When I disabled it, that fixed the problem. However, thank you for taking the time and looking into this issue.
Best Regards
comment:10 by , 10 years ago
| Resolution: | → worksforme |
|---|---|
| Status: | reopened → closed |
Thanks for this information.
Actually this is not a bug at all. VirtualBox can only handle guests with a lot of RAM if VT-x or AMD-V is available. This is just a limitation of the VMM implementation. For some reason, VT-x is disabled in your host BIOS. Please enable VT-x and you will be able to run guests with more than 3584MB RAM.