desktop-packages team mailing list archive

[Václav Šmilauer <eu@xxxxxxxx>]

*** This bug is a duplicate of bug 589485 ***
    https://bugs.launchpad.net/bugs/589485

@Timo seriously, don't set "won't fix" when you manifestly have no clue
what this bug is about. It would be more helpful to find the LP
duplicate and set it, which I just did.

** This bug has been marked a duplicate of bug 589485
   Ignores physical display size and calculates based on 96DPI

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https://bugs.launchpad.net/bugs/1512606

Title:
  Display size incorreectly detected (assuming 96x96 DPI)

Status in xserver-xorg-video-intel package in Ubuntu:
  Won't Fix

Bug description:
  I am running 14.10 on Lenovo Yoga 12 with 280x160mm panel with
  1920x1080 resolution, which translates to 174x171 DPI by trivial
  calculation. The panel size is correctly reported by edid:

  $ get-edid | parse-edid
  This is read-edid version 3.0.2. Prepare for some fun.
  Attempting to use i2c interface
  No EDID on bus 0
  No EDID on bus 1
  No EDID on bus 2
  No EDID on bus 3
  No EDID on bus 5
  1 potential busses found: 4
  256-byte EDID successfully retrieved from i2c bus 4
  Looks like i2c was successful. Have a good day.
  Checksum Correct

  Section "Monitor"
  	Identifier "
"
  	ModelName "
"
  	VendorName "LGD"
  	# Monitor Manufactured week 0 of 2013
  	# EDID version 1.4
  	# Digital Display
  	DisplaySize 280 160
  	Gamma 2.20
  	Option "DPMS" "false"
  	Modeline 	"Mode 0" 138.46 1920 1968 2000 2106 1080 1083 1088 1095 +hsync -vsync 
  EndSection

  The XServer thinks something different:

  $ xdpyinfo | grep -B2 resolution
  screen #0:
    dimensions:    1920x1080 pixels (508x285 millimeters)
    resolution:    96x96 dots per inch

  where the physical size is garbage. The driver sets DPI to 96 despite
  having correct data, and there seems to be no straightforward way to
  force a different DPI (see e.g. [1]). The internet is full of various
  workarounds for HiDPI displays, which include setting text-scaling-
  factor in dconf (gnome-only) , layout.css.devPixelsPerPt (mozilla
  products), scaling-factor (integer values only?), all of the toolkit-
  or program-specific. They have all of them some gotchas (such as
  terribly-looking interface, different scaling of some text, ugly icons
  etc).

  I am willing to help debugging the driver, since Ubuntu should have a
  way to behave well out-of-box on HiDPI configurations. If the driver
  reports the right DPI, I assume many of those issue would disappear.

  [1] https://ask.fedoraproject.org/en/question/39272/how-to-configure-
  screen-dpi-ppi-properly/

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  BootLog:
   [  OK  ] Started Modem Manager.
   [  OK  ] Started Detect the available GPUs and deal with any system changes.
            Starting Light Display Manager...
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Nov  3 08:54:40 2015
  DistUpgraded: Fresh install
  DistroCodename: wily
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:503e]
  InstallationDate: Installed on 2015-08-31 (63 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 20DLCTO1WW
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=f5cdca16-e2f9-4b9e-b12c-65011c787ea7 ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/05/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: JEET66WW (1.15 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20DLCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0K11826 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrJEET66WW(1.15):bd06/05/2015:svnLENOVO:pn20DLCTO1WW:pvrThinkPadS1Yoga12:rvnLENOVO:rn20DLCTO1WW:rvrSDK0K11826WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20DLCTO1WW
  dmi.product.version: ThinkPad S1 Yoga 12
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.64-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
  xserver.bootTime: Mon Nov  2 08:12:10 2015
  xserver.configfile: default
  xserver.errors:
   Wacom ISDv4 EC Pen stylus: Invalid type 'cursor' for this device.
   Wacom ISDv4 EC Pen stylus: Invalid type 'touch' for this device.
   Wacom ISDv4 EC Pen stylus: Invalid type 'pad' for this device.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1079 
   vendor                                     LGD
  xserver.version: 2:1.17.2-1ubuntu9

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