Opened 8 years ago
Last modified 8 years ago
#16119 new defect
Extremely slow text display in safe mode boot with Windows Server 2008 guest
| Reported by: | Donuts | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 5.1.8 |
| Keywords: | Cc: | ||
| Guest type: | Windows | Host type: | Linux |
Description
Host: Lubuntu 16.04 x86-64, Core 2 Duo T9500 CPU Guest: Windows Server 2008 x86
I created a Windows Server 2008 VM, single CPU, VT-x, no I/O APIC.
It boots normally fine. However if I boot in safe mode (press F8 at startup), text rendering is incredibly slow. It's like a 300 baud modem: each line of text appears slowly. Once the screen is full, it takes ages to redraw the whole screen scrolled up by one line.
I noticed this in the changelog for VirtualBox 2.2.0: "VMM: fixed extremely slow safe mode booting in e.g. Windows 2008 (VT-x/AMD-V only)"
Could there have been some regression causing that problem to reappear?
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After disabling VT-x for the VM, safe mode boot text output is much faster (~5 times faster), though still relatively slow.