[vbox-dev] 答复: frontend with no display/framebuffer

[Klaus Espenlaub]

On 22.09.2014 06:00, DRACULAX wrote:
> Thanks and I write a nullframebuffer (grab from VBoxHeadless) and it
> work now.
>
> And now I has another question. It seem that the own-defined frontend
> only can start from virtualbox installed folder.
>
> If I put my MyFrontEnd.exe into another folder and start it, the log say
> the vm can not find the vboxvmm.dll and the path is wrong.
>
> It look for core dlls from my exe’s dir.
>
> Is it harden-coding?

Yes and no - it uses the directory where the executable lives to locate 
the DLLs, and when you put the executable in a different place than the 
VirtualBox install directory, it will not find key components.

Hard to fix this generically...

Klaus
>
> *发件人:*Klaus Espenlaub [mailto:klaus.espenlaub at oracle.com]
> *发送时间:*2014年9月18日21:03
> *收件人:*vbox-dev at virtualbox.org
> *主题:*Re: [vbox-dev] frontend with no display/framebuffer
>
> On 17.09.2014 12:03, DRACULAX wrote:
>
> Hi, guys, I recently build my frontend which based on VBoxHeadless.exe
>
> except that I do not create any framebuffer for it.
>
> When I start my frontend it got the following error output.
>
> It looks like the vga device failed to start.
>
> Am I missing something? Is the framebuffer object needed anyway?
>
> Yes, as long as the VGA card is configured (in 4.3 you can actually
> disable it using CLI) it needs a framebuffer. Wonder why it's worth
> implementing a framebuffer-less VBoxHeadless look-alike.
>
> It's required to get at the screen content, and it was considered too
> unusual to have a VGA card and no framebuffer. When disabling VGA it's a
> valid setup.
>
> Klaus
>
>
> Best regards for you
>
> VirtualBox VM 4.3.10 r93012 win.amd64 (Mar 26 2014 18:53:57) release log
>
> 00:00:00.824047 Log opened 2014-09-17T08:54:22.362547900Z
>
> 00:00:00.824047 Build Type: release
>
> 00:00:00.963055 DMI Product Name: 3443A96
>
> 00:00:00.968055 DMI Product Version: ThinkPad X1 Carbon
>
> 00:00:00.968055 Host RAM: 3776MB total, 880MB available
>
> …
>
> …
>
> 00:00:03.319951 CPUM: SetGuestCpuIdFeature: Enabled APIC
>
> 00:00:03.335542 PIT: mode=3 count=0x10000 (65536) - 18.20 Hz (ch=0)
>
> 00:00:03.353628 Shared Folders service loaded.
>
> 00:00:03.364024 PDM: Failed to construct 'vga'/0! VERR_INVALID_STATE
> (-79) - Generic invalid state error.
>
>