This log shows that the probing detects the high resolution modes [ 111.418] (II) AMDGPU(0): Printing probed modes for output DisplayPort-0 [ 111.418] (II) AMDGPU(0): Modeline "3840x2160"x60.0 533.25 3840 3888 3920 4000 2160 2163 2168 2222 +hsync -vsync (133.3 kHz eP) [ 111.418] (II) AMDGPU(0): Modeline "3840x2160"x30.0 297.00 3840 4016 4104 4400 2160 2168 2178 2250 +hsync +vsync (67.5 kHz e)
but doesn't appear to determine anything via DDC on the displayport. Again this doesn't seem to have been an issue until the driver updates applied on the 23rd (dpkg.log in separate attachment), ** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1784240/+attachment/5169275/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1784240 Title: Driver doesn't correctly probe Samsung U28D590D 28-inch 4k after recent update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1784240/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
