External monitor screen washed out after upgrading to linux-6.18 #12684
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Weird enough, on linux-6.17.9, if I blank the screen with dispatch dpms for the DELL P3421W, the Lenovo L28u-30 blinks and returns with washed out colors. When I reactivate the Dell screen, the Lenovo blinks and returns with normal colors. |
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External monitor Lenovo L28u-30 is now washed out and blacks appear as gray after installing linux-6.18.1 on archlinux. Issue occurs at both 60 and 30 hz, but disappears if I drop the resolution from 3840x2160 to anything lower. Issue persists if connected through docking station (both/either DP1.2 or HDMI) or directly connected to Dell Precision 5680 laptop (HDMI).
No HDR on this system, no 10 bit anything, just flat srgb 8 bit stuff. Issue does not occur on DELL P3421W, though that's not quite 4k.
Rolling back to linux-6.17.9 and rebooting corrects the issue. Let me know if I can provide any additional info. Config is pretty straightforward, just monitors auto/preferred/1.0
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