[ale] VirtualBox Linux guest screen resolution

[Alex Carver via Ale]

I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution. This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions. I wanted KDE to run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).

I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.
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[DJ-Pfulio via Ale]

Increase the default video RAM to 128MB for the VM.

Post by Alex Carver via Ale
I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution. This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions. I wanted KDE to run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).
I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.

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[Alex Carver via Ale]

Already did that. However, it looks like KDE is stumbling on
acceleration. I started disabling various things and when I disabled
video acceleration it behaved properly.

Post by DJ-Pfulio via Ale
Increase the default video RAM to 128MB for the VM.

Post by Alex Carver via Ale
I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution. This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions. I wanted KDE to run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).
I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.

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[Alex Carver via Ale]

I want the number of pixels in the virtual screen to be bigger, not just
magnify the screen. The window was defaulting to 800x600 pixels for the
virtual desktop environment and wouldn't change. The screen needed to
be bigger for guest applications that use large layouts.

It appears that the issue was KDE's use of graphics acceleration not
being compatible with the acceleration features of the virtualized
graphics card. I turned off all acceleration and the screen now accepts
larger resolutions but it's just a slightly slower render.

There should be a menu selection for %zoom. Bump that up to 125 or 150
percent to enlarge the virtual screen on your real screen. I've had to
do that when using tty screens in VB.
-- 

Post by Alex Carver via Ale
I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution.  This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions.  I wanted KDE to
run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).
I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.

[DJ-Pfulio via Ale]

Could it be wayland related?
Can you fallback to X11/xorg for a display server?

BTW, Ubuntu 18.04 is defaulting back to xorg for the display server.
Wayland isn't quite ready, it seems.

Post by Alex Carver via Ale
I want the number of pixels in the virtual screen to be bigger, not just
magnify the screen. The window was defaulting to 800x600 pixels for the
virtual desktop environment and wouldn't change. The screen needed to
be bigger for guest applications that use large layouts.
It appears that the issue was KDE's use of graphics acceleration not
being compatible with the acceleration features of the virtualized
graphics card. I turned off all acceleration and the screen now accepts
larger resolutions but it's just a slightly slower render.

There should be a menu selection for %zoom. Bump that up to 125 or 150
percent to enlarge the virtual screen on your real screen. I've had to
do that when using tty screens in VB.
-- 

Post by Alex Carver via Ale
I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution.  This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions.  I wanted KDE to
run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).
I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.

[Alex Carver via Ale]

The cause is unclear. There are KDE developer threads that I've found
discussing this issue going back several years. KDE claims it's a
VirtualBox problem but some people say it's not exactly a VirtualBox
problem because other guest OSes (notably Windows) are able to utilize
the acceleration features.

I'm already using X11 as the manager. Wayland is not installed.

Post by DJ-Pfulio via Ale
Could it be wayland related?
Can you fallback to X11/xorg for a display server?
BTW, Ubuntu 18.04 is defaulting back to xorg for the display server.
Wayland isn't quite ready, it seems.

Post by Alex Carver via Ale
I want the number of pixels in the virtual screen to be bigger, not just
magnify the screen. The window was defaulting to 800x600 pixels for the
virtual desktop environment and wouldn't change. The screen needed to
be bigger for guest applications that use large layouts.
It appears that the issue was KDE's use of graphics acceleration not
being compatible with the acceleration features of the virtualized
graphics card. I turned off all acceleration and the screen now accepts
larger resolutions but it's just a slightly slower render.

There should be a menu selection for %zoom. Bump that up to 125 or 150
percent to enlarge the virtual screen on your real screen. I've had to
do that when using tty screens in VB.
-- 

Post by Alex Carver via Ale
I'm trying to install a linux gest into VirtualBox but the system has
assumed a very small virtual screen resolution.  This is actually the
second attempt at installing because the first one had the video mess up
after I installed the Guest Additions extensions.  I wanted KDE to
run
but all of the KDE windows would disappear (worked fine before trying to
get the resolution right).
I'd appreciate suggestions for installing the guest and getting its
resolution correct on the first go.

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http://mail.ale.org/mailman/listinfo

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