DPI not detected

[Hans Ginzel]

Xorg did not correctly detect the display resolution.

# grep DPI /var/log/Xorg.0.log
[ 60.216] (==) intel(0): DPI set to (96, 96)
instaed of 145 dpi (12.1" TFT display with 1400x1050 resolution)
http://www.thinkwiki.org/wiki/Category:X60_Tablet
http://members.ping.de/~sven/dpi.html

See also bug #1164361.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
Uname: Linux 3.8.0-16-generic i686
.tmp.unity.support.test.0:

ApportVersion: 2.9.2-0ubuntu5
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Thu Apr 4 10:43:58 2013
DistUpgraded: 2013-02-14 15:12:00,672 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.2.10, 3.8.0-14-lowlatency, i686: installed
 virtualbox, 4.2.10, 3.8.0-16-generic, i686: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Lenovo ThinkPad T60/R60 series [17aa:201a]
   Subsystem: Lenovo ThinkPad T60/R60 series [17aa:201a]
MachineType: LENOVO 6363C7G
MarkForUpload: True
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-16-generic root=UUID=67e0b1b8-90e3-4c3c-9a9b-d42f21ad104b ro
SourcePackage: xorg
UpgradeStatus: Upgraded to raring on 2013-02-14 (48 days ago)
dmi.bios.date: 11/20/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 7JET30WW (1.15 )
dmi.board.name: 6363C7G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7JET30WW(1.15):bd11/20/2008:svnLENOVO:pn6363C7G:pvrThinkPadX60Tablet:rvnLENOVO:rn6363C7G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 6363C7G
dmi.product.version: ThinkPad X60 Tablet
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.9~daily13.03.29-0ubuntu1
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Wed Apr 3 19:44:49 2013
xserver.configfile: default
xserver.errors:
 Serial Wacom Tablet stylus: Invalid type 'cursor' for this device.
 Serial Wacom Tablet stylus: Invalid type 'touch' for this device.
 Serial Wacom Tablet stylus: Invalid type 'pad' for this device.
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu4
xserver.video_driver: intel

[Timo Aaltonen (tjaalton)]

no, the dpi is hardcoded to 96 for a reason:

https://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/xsettings/gsd-xsettings-manager.c#n67

[Hans Ginzel (hans-matfyz)]

Thank you. Is this the correct way to manually override
xrandr --dpi 145
?