RE: [Bug 1871250] Failed to create HAX VM

["Morris, Russell" <rmorris@rkmorris.us>]

Hi Volker,

I need to take back something I said - my error! 😊. I got fooled a bit, let me try to explain.

I ran the "stock" download, the Windows version that QEMU points to (web site). It does say it's v4.2.0, but seems it's not quite, it's v4.2.0 with some more recent updates (but version number not showing that). It fails when trying to use haxm.

So I went back, built "real" v4.2.0 myself (from scratch, to make sure) ... and haxm works, just like you said. I also updated to the master, and applied the patch from below ... now that works as well. Thanks!

I can close out this bug report if you want, or leave it open until this patch is in the master - whatever you prefer. And I can update the bug report if you want. Please just let me know how you want it handled.

Thanks again for the help!

... Russell



-----Original Message-----
From: Volker Rümelin <vr_qemu@t-online.de> 
Sent: Tuesday, April 7, 2020 2:18 PM
To: Bug 1871250 <1871250@bugs.launchpad.net>; Morris, Russell <rmorris@rkmorris.us>
Cc: qemu-devel@nongnu.org
Subject: Re: [Bug 1871250] Failed to create HAX VM

> Hi,
>
> I'm running the latest (master) of QEMU, though the version doesn't 
> seem to matter - I also checked back to v4.2.0, exactly the same 
> issue. And this isn't about the VM (guest), if I even just try to run,
>
>> "c:\Program Files\qemu\qemu-system-x86_64.exe" -accel hax

Hi Russell,

at the moment you need this patch at
https://lists.nongnu.org/archive/html/qemu-devel/2020-03/msg06831.html

But I can't see why v4.2.0 doesn't work on your system. The bug was introduced later.

> Basically, just get a window to open, with acceleration enabled ... I 
> get, Open the vm device error:/dev/hax_vm/vm00, ec:3 Failed to open vm 
> 0 Failed to create HAX VM No accelerator found.
>

ec:3 is ERROR_PATH_NOT_FOUND

With best regards,
Volker