Haiku-hrevr1alpha4-44576 VirtualBox - VBoxManage setextradata "Haiku" "CustomVideoMode1"

I’m running VirtualBox 4.1.14 on Slackware 13.37 x86 on a Sony Vaio 15" laptop, running Intel i3 and Nvidia 410M and I’m not able to use this virtualbox command to change resolutions;

VBoxManage setextradata “Haiku4” “CustomVideoMode1” “1366x768x32”

These are two resolutions I’ve been able to get to work;

1280x800
1400x1050

1366x768 is my native resolution on the laptop, so I assumed it would work?

Anyone have any ideas on how to check what resolutions this is going to work with support, I can test, or how I can fix this?

THANKS

I’m not sure what the problem is, but that resolution does work fine for me.
as seen here: http://db.tt/9t9xQbNV

I also have 1920x1080x32

Works for me in VirtualBox 4.2, when I added a 1080p resolution (needed to be 32 bit, crashed VirtualBox with 8 bit). Make sure your host OS (Windows or Linux) does support that resolution. You did then go into Haiku and use the Screen preference to change to the newly available resolution?