Re: [PATCH 0/4] Add QemuRamfbDxe driver

[Laszlo Ersek <lersek@redhat.com>]

On 06/12/18 11:21, Gerd Hoffmann wrote:
>   Hi,
> 
>> - What happens in the UEFI shell if you do recursive connect/disconnect
>> cycles for all handles in the system? (Preferably initiated from serial.)
> 
> Seems to work fine (tried "disconnect -a" and "connect").

Cool.

> 
>> - What happens if you locate the parent handle (with the VenHw node)
>> and/or the child handle (with the GOP on it), and try to disconnect them?
> 
> How can I do that?

Run "dh -d -v -p GraphicsOutput". The listing will include all handles
(represented by hex identifiers) that carry a GOP. Each handle will also
have its device path protocol instance displayed, in textual
representation, so if there are multiple GOPs, you'll be able to locate
the one produced by QemuRamfbDxe. The listing should also reference the
parent controller handle.

Knowing the hex identifiers for parent and child, experiment with the
"disconnect" command. (See "help disconnect" for syntax.)

>> - Have you tested mode changes with the MODE command?
> 
> Yes, works.

Nice!

Thansk
Laszlo