This bug is still present. xdpyinfo reports always 96x96 dpi resulting in wrong screen dimensions and incorrect scaling.
$ xdpyinfo | grep -B2 resolution screen #0: dimensions: 3840x2160 pixels (1016x571 millimeters) resolution: 96x96 dots per inch however, xrandr is right; $ xrandr | grep DP1 DP1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 600mm x 340mm -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/201491 Title: Screen DPI detected incorrectly by xdpyinfo Status in X.Org X server: Unknown Status in xorg-server package in Ubuntu: Invalid Bug description: Binary package hint: xorg It seems tools like xdpyinfo are reporting screen sizes as 300x230 mm in a lot of cases when they are not. On my own Iiyama ProLite E431S with an ATI Radeon 9800 Pro connected over DVI using the "ati" driver, I get this from xdpyinfo: screen #0: dimensions: 1280x1024 pixels (300x230 millimeters) resolution: 108x113 dots per inch ddcprobe correctly detects the screen physical dimensions: screensize: 34 27 In another report, https://bugs.launchpad.net/ubuntu/+source/xserver- xorg-video-intel/+bug/201032 the reporter shows that xdpyinfo quotes: screen #0: dimensions: 1280x800 pixels (300x230 millimeters) resolution: 108x88 dots per inch and ddcprobe reports: screensize: 33 21 Notice that the screens are actually different dimensions, both in physical terms and pixel terms, yet xdpyinfo thinks they are 300x230 mm. Also, the other reporter is using the intel driver. This did indeed used to work correctly in the early Hardy alphas, and previous releases of Ubuntu. ProblemType: Bug Architecture: i386 Date: Wed Mar 12 17:34:11 2008 DistroRelease: Ubuntu 8.04 Package: xorg 1:7.3+10ubuntu6 PackageArchitecture: i386 SourcePackage: xorg Uname: Linux 2.6.24-11-386 i686 To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/201491/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
