| Summary: | Display Configuration Module cannot handle a LG 5K monitor | ||
|---|---|---|---|
| Product: | [Applications] systemsettings | Reporter: | Paul Hands <jphands> |
| Component: | general | Assignee: | Plasma Bugs List <plasma-bugs-null> |
| Status: | RESOLVED NOT A BUG | ||
| Severity: | normal | ||
| Priority: | NOR | ||
| Version First Reported In: | 5.27.10 | ||
| Target Milestone: | --- | ||
| Platform: | Neon | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: | Two monitors of same vertical pixel count show different heights | ||
Update. A bunch of internet searching revealed that this isn't a bug. It's actually a problem with what kind of cable you use to connect the GPU to the monitor. An HDMI cable displays the problems seen in this report. Using a Display Port cable works immediately, but this information is not at all obvious. |
Created attachment 165054 [details] Two monitors of same vertical pixel count show different heights SUMMARY I just acquired a new LG 34BK95U-W monitor, which has a max resolution of 5120 x 2160 at 60Hz. It works just fine on a Macbook Pro, but when connected to my KDE Neon box, it just won't work properly. I added some new modes via xrandr because KDE thought it has a max resolution of 4K - 3840 x 2160, When I added those modes, the monitor shows up as 5120 x 2160 capable, but it's impossible to configure the 5K monitor beside another 4k monitor at 3840 x 21260, without the displays overlapping. Also, the Neon Display Configuration module shows two monitors with a vertical resolution of 2160 as different heights. See attached screenshot. Because of the height difference the cursor jumps vertically when moving from one monitor to another, and the cursor won't go between the two monitors at all if in the upper zone where they don't touch. I'm sure this is an underlying EDID problem, rather than with Plasma, but I didn't expect Linux to be unable to handle new hardware these days. Operating System: KDE neon 5.27 KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.113.0 Qt Version: 5.15.11 Kernel Version: 6.5.0-14-generic (64-bit) Graphics Platform: X11 Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor Memory: 46.9 GiB of RAM Graphics Processor: AMD Radeon RX 6600 Manufacturer: ASUS