Opened 15 months ago

Last modified 15 months ago

#21013 new defect

Linux guest additions use 0.06 Hz refresh rate for custom display resolutions

Reported by: refi64 Owned by:
Component: guest additions/x11/graphics Version: VirtualBox 6.1.34
Keywords: smsvga Cc:
Guest type: Linux Host type: all


This can be reliably be reproduced on any Linux guest:

  • Install the guest additions onto a Linux guest (tested with Debian & Fedora guests).
  • Make sure the package corresponding to the xf86-video-vmware driver is removed, so that the driver doesn't add the resolutions before VBoxClient itself can (see notes below for more details). (On Debian & derivatives, this can be done via sudo dpkg -r --force-depends xserver-xorg-video-vmware.)
  • Make sure you've rebooted after doing the above.
  • Resize the VBox guest window.
  • Run xrandr.
  • Observe that any new resolutions added by the guest additions (ending in _vbox) all have a refresh rate of 0.06 Hz:
$ xrandr
Screen 0: minimum 320 x 200, current 1900 x 1920, maximum 8192 x 8192
Virtual-1 connected primary 1900x1920+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   preferred     60.00 +
   2560x1600     59.99  
   1920x1440     60.00  
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
   1990x1920_vbox   0.06  
   1860x1920_vbox   0.06  
   1940x1920_vbox   0.06  
   1900x1920_vbox   0.06*

This completely breaks the ability to use recent versions of Electron applications w/o xf86-video-vmware, which seem to respect this refresh rate when rendering.


  • This doesn't occur if xf86-video-vmware is installed because then VBox doesn't add the new resolutions itself: since both VBox & VMware use SVGA, xf86-video-vmware picks up the resize first and adds the resolutions it wants, after which the VBoxClient --smsvga sees a matching resolution is already present and does nothing.
  • This has been reproduced on multiple different host systems.

Attachments (1)

vbox-log.txt (101.9 KB ) - added by refi64 15 months ago.
Log file, including resizing the guest

Download all attachments as: .zip

Change History (2)

by refi64, 15 months ago

Attachment: vbox-log.txt added

Log file, including resizing the guest

comment:1 by galitsyn, 15 months ago

Thank you for reporting the issue. It should be fixed in VirtualBox 6.1.36. Please refer to page.

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