VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Discussions about using Linux guests in VirtualBox.
Post Reply
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

I have tried new virtual machine (Ubuntu 20.04LTS) on VirtualBox 6.1.10 for Windows, now.
Native Graphics is 1920x1080 by intel 8th Gen. core-i5 8250U with Intel UHD Graphics 620.
VMSVGA virtual adapter is set to 18MB without enable 3D Acceralation checked.
Host-F key makes successfully to switch full screen, but too many flickering, unusable this setting.
How can I get stable graphics as like as before VirtualBox 6.1.2 ?
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

Re: VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

I changed to set VRAM of VMSVGA virtual adapter to 64MB, it seems pretty good choice for flickering on full screen mode,
but it has kept stable graphics only few minute. It has break down stable to flickering screen after 3 minute from booting.
The screen flickering is occurred in both full screen mode and VRDP client screen.
The set of Scale mode window and VRDP are no problem. Hum...
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

Re: VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

I have tested Ubuntu 18.04.3 LTS on VirtualBox 6.1.10 for Windows, with Guest Addition 6.1.10 and VMSVGA adapter.
Video Memory is 16MB only, and screen resolution is 1920x1080 in full screen mode, it is stable. What is different to VM of Ubuntu 20.04 ?
But, it is not stable with VRDP client connection, both VRDP server and client display are flickering in time with VRDP connection.

Is this problem occurred with GA 6.1.10 ? I will test to down grade for Guest Addition to 6.1.8, 6.1.6, and 6.1.2.
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

Re: VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

I changed VM settings of (Ubuntu 20.04) Main Memory 4096MB to 2048MB. It is stable that graphics in full screen (1920x1080) mode is.
But, VRDP (VirtualBox extension pack 6.1.10) connection is not stable (flickering is occurred both VRDP Client and Server screen), yet.
I have tried to down grade Guest Addition 6.1.10 to 6.1.2, however the behavior is not changed nothing else.

VRDP client is able to connect stably in which display is switched to Scaled mode.
I will wait improvement of Guest Addition for this problems.
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

Re: VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

I changed VM settings of (Ubuntu 20.04) Main Memory 4096MB to 2048MB. It is stable that graphics in full screen (1920x1080) mode is.
But, VRDP (VirtualBox extension pack 6.1.10) connection is not stable (flickering is occurred both VRDP Client and Server screen)
I have believed this trouble occurred by conflict between auto-resizing to full screen on Guest Addition and VRDP client,
because of different resolution is suitable (local screen is 1920x1080, and VRDP client on my MacBook Pro is used in 2048x1280).
When has VRDP(VirtualBox extension pack) used suitable resolution for full screen on client environment ?
apo2
Posts: 70
Joined: 18. Jan 2018, 20:49

Re: VMSVGA (GA 6.1.10) in Full Screen mode is flickered

Post by apo2 »

The guest OS of VM are Ubuntu 20.04LTS and Ubuntu 18.04.4 LTS, they are not using XWayland, and are using XOrg on defaults.
I have suspected this trouble is causing the X11 issue on guests using Xwayland instead of Xorg, however that was unexpected.
Has anyone gotten into this trouble ? We need more informations to improve the Guest Additions.
Post Reply