Public bug reported:
I have the common problem of everything being too small when switching
to a 4K monitor. One issue is that X is setting DPI to 96 instead of
157 for my 28" 4K monitor.
This is a Radeon RX480 and I've installed xserver-xorg-hwe. If I run
get-edid | parse-edid, the correct display dimensions are returned
(620x340mm). I see:
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
No EDID on bus 1
No EDID on bus 2
No EDID on bus 3
No EDID on bus 4
No EDID on bus 5
No EDID on bus 6
No EDID on bus 7
No EDID on bus 8
No EDID on bus 9
1 potential busses found: 0
256-byte EDID successfully retrieved from i2c bus 0
Looks like i2c was successful. Have a good day.
Checksum Correct
Section "Monitor"
Identifier "MP Monitor"
ModelName "MP Monitor"
VendorName "RX_"
# Monitor Manufactured week 41 of 2016
# EDID version 1.3
# Digital Display
DisplaySize 620 340
Gamma 2.20
Option "DPMS" "true"
Horizsync 23-80
VertRefresh 30-160
# Maximum pixel clock is 600MHz
#Not giving standard mode: 1280x720, 60Hz
#Not giving standard mode: 1280x1024, 60Hz
#Not giving standard mode: 1440x900, 60Hz
#Not giving standard mode: 1600x900, 60Hz
#Not giving standard mode: 1680x1050, 60Hz
#Not giving standard mode: 1920x1080, 60Hz
#Not giving standard mode: 1920x1200, 60Hz
#Extension block found. Parsing...
#WARNING: I may have missed a mode (CEA mode 97)
#DOUBLE WARNING: It's your first mode, too, so this may actually be important.
#WARNING: I may have missed a mode (CEA mode 96)
#WARNING: I may have missed a mode (CEA mode 101)
#WARNING: I may have missed a mode (CEA mode 102)
#WARNING: I may have missed a mode (CEA mode 93)
#WARNING: I may have missed a mode (CEA mode 94)
#WARNING: I may have missed a mode (CEA mode 95)
#WARNING: I may have missed a mode (CEA mode 98)
Modeline "Mode 18" 148.50 1920 2008 2052 2200 1080 1084 1089
1125 +hsync -vsync
Modeline "Mode 0" 297.00 3840 3888 3920 4400 2160 2163 2169 2250
+hsync -vsync
Modeline "Mode 1" 241.50 2560 2608 2640 2720 1440 1443 1449 1481
+hsync -vsync
Modeline "Mode 2" 148.500 1920 2008 2052 2200 1080 1084 1089
1125 +hsync +vsync
Modeline "Mode 3" 74.250 1920 2008 2052 2200 1080 1082 1087 1125
+hsync +vsync interlace
Modeline "Mode 4" 74.250 1280 1390 1420 1650 720 725 730 750
+hsync +vsync
Modeline "Mode 5" 27.027 720 736 798 858 480 489 495 525 -hsync
-vsync
Modeline "Mode 6" 27.027 720 736 798 858 480 489 495 525 -hsync
-vsync
Modeline "Mode 7" 27.027 1440 1478 1602 1716 480 484 487 525
-hsync -vsync interlace
Modeline "Mode 8" 27.000 1440 1464 1590 1728 576 578 581 625
-hsync -vsync interlace
Modeline "Mode 9" 25.200 640 656 752 800 480 490 492 525 -hsync
-vsync
Modeline "Mode 10" 148.500 1920 2448 2492 2640 1080 1084 1089
1125 +hsync +vsync
Modeline "Mode 11" 27.000 720 732 796 864 576 581 586 625 -hsync
-vsync
Modeline "Mode 12" 74.250 1280 1720 1760 1980 720 725 730 750
+hsync +vsync
Modeline "Mode 13" 74.250 1920 2448 2492 2640 1080 1082 1089
1125 +hsync +vsync interlace
Modeline "Mode 14" 74.250 1920 2558 2602 2750 1080 1084 1089
1125 +hsync +vsync
Modeline "Mode 15" 27.000 1440 1464 1590 1728 576 578 581 625
-hsync -vsync interlace
Modeline "Mode 16" 27.000 720 732 796 864 576 581 586 625 -hsync
-vsync
Modeline "Mode 17" 27.027 1440 1478 1602 1716 480 484 487 525
-hsync -vsync interlace
Modeline "Mode 19" 148.50 1920 1968 2000 2640 1080 1084 1089
1125 +hsync -vsync
Modeline "Mode 20" 74.25 1920 2008 2052 2200 540 542 547 562
+hsync +vsync interlace
Option "PreferredMode" "Mode 18"
EndSection
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-58.63~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-58-generic x86_64
.tmp.unity_support_test.0:
ApportVersion: 2.20.1-0ubuntu2.6
Architecture: amd64
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: Fri Jul 7 01:51:59 2017
DistUpgraded: 2016-05-31 04:27:01,635 DEBUG icon theme changed, re-reading
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/580]
[1002:67df] (rev c7) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Radeon RX 480 [1043:04fb]
InstallationDate: Installed on 2016-05-30 (402 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Supermicro X10DAi
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-58-generic
root=/dev/mapper/vg--root-lvol0 ro quiet splash nomdmonddf nomdmonisw
vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to xenial on 2016-05-31 (401 days ago)
dmi.bios.date: 01/29/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.0c
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X10DAI
dmi.board.vendor: Supermicro
dmi.board.version: 1.01
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1.0c:bd01/29/2015:svnSupermicro:pnX10DAi:pvr123456789:rvnSupermicro:rnX10DAI:rvr1.01:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: X10DAi
dmi.product.version: 123456789
dmi.sys.vendor: Supermicro
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1~ubuntu16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.6-0ubuntu0.16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.6-0ubuntu0.16.04.1
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Fri Jul 7 01:42:35 2017
xserver.configfile: default
xserver.devices:
input Power Button KEYBOARD, id 6
input Power Button KEYBOARD, id 7
input Logitech Trackball MOUSE, id 8
input LITE-ON Technology USB NetVista Full Width Keyboard. KEYBOARD, id
9
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-1ubuntu6.1~16.04.1
xserver.video_driver: amdgpu
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 fonts ubuntu xenial
--
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1702827
Title:
X fails to set DPI correctly
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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1702827/+subscriptions
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