Opened 6 years ago
#18715 new defect
Resolutions >= 4096px wide break VboxVGA and VboxSVGA
| Reported by: | SinisterMinister | Owned by: | |
|---|---|---|---|
| Component: | guest additions/x11/graphics | Version: | VirtualBox 6.0.8 |
| Keywords: | resolution, dci 4k | Cc: | |
| Guest type: | Linux | Host type: | Windows |
Description
When trying to use a DCI 4k monitor (4096x2160) in fullscreen mode, the resolution kept being set to 1024x2160. VMSVGA correctly supports the resolution, but with a huge performance hit.
With more investigation, it seems like the resolution width is being calculated as resolution_width = requested_resolution_width mod 4096 with it falling back to 1024 if the result is 0.
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