Opened 2 years ago
Last modified 11 months ago
#18004 new bug
intel_extreme not detecting valid resolution/refresh combinations (LG HD TV UH8500, 4k resolution) — at Initial Version
| Reported by: | jgrindle | Owned by: | rudolfc |
|---|---|---|---|
| Priority: | normal | Milestone: | Unscheduled |
| Component: | Drivers/Graphics/intel_extreme/kabylake | Version: | R1/beta3 |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | x86-64 |
Description
Display: LG TV UH8500 native 3840x2160 connected via HDMI
Graphics: Intel HD Graphics 630 (on-board)
CPU: Intel Core i5-7600 @3.8GHz
RAM: 16GB
Haiku: hrev56536-x86_64 installed to SSD
The syslog shows a limited number of resolutions detected or possibly assumed (for the display, I think, not the on-board graphics), all at 60Hz. The display itself supports 60Hz at or below 1920x1080, but only supports 30Hz or lower for resolutions higher than 1920x1080.
Screenshot attached of display's highest supported resolutions, as listed from Windows.
In hrev56536 if VESA mode is not selected, the adaptor automatically falls back to 800x600@60Hz (earlier revisions apparently tried to set a higher than 1920x1080 resolution @60Hz by default resulting in a black screen; ctrl+alt+shift+esc successfully forced a lower resolution).
In Screen preferences, the highest resolutions listed are 1920x1080@60Hz and 3840x2160@60Hz, the latter of which is out of range for refresh. There is no way to change the refresh to 30Hz (minimum is 58 on the slider). Selecting 1920x1080@60Hz works.
Note: since this is my first Haiku bug report I may need a little extra help to provide any additional info.
