On the other hand, maybe we need to treat disabling the default colour profile as a workaround.
I forgot to mention that in at least one case I noticed similar problems in web browsers and image viewers even when using a properly custom calibrated profile for my display. So a real fix might have to come in the apps themselves, or maybe just one or two image decoding libraries that are misinterpreting the profile data (maybe they don't know or expect the whole compositor is applying the profile already?). To do this someone would need to dig into the code of an affected app and see how/where it is using the colour profile data. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to colord in Ubuntu. https://bugs.launchpad.net/bugs/1785764 Title: Ubuntu default colour profile distorts colours on some machines (white looks green, too dark, or under-saturated) Status in colord package in Ubuntu: Confirmed Status in gnome-control-center package in Ubuntu: Confirmed Bug description: Using Ubuntu 18.04.1 LTS Running on an i7-6700k with a GTX 1080 Reproducible with nvidia-driver-396 or xserver-xorg-video-nouveau and a single 4K screen (TV) connected via HDMI. The issue: Any dark content displayed by an effected application (e.g. a very dark image or dark themed web page) is much darker than intended making it almost unusable. This only effects applications that are launched when the 4K screen is connected. If i disconnect the 4K screen, launch the app via a different 1080p monitor then reconnect the 4K screen the app remains unaffected. The only apps i have found so far that are effected by this are Google Chrome and Image Viewer. That said this is only noticeable when the app is displaying dark contend so if other apps are affected it may be impossible to tell. The attached screenshot uses a black to white gradient image to clearly demonstrate the issue. Is seems like it may be an issue with colour depth as bellow a certain brightness it just goes strait to black. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/colord/+bug/1785764/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
