Ubuntu
xserver-xorg-video-nouveau package

nouveau forces screen to 96 DPI

Bug #600374 reported by Anders Kaseorg on 2010-06-30

This bug report is a duplicate of: Bug #589485: Ignores physical display size and calculates based on 96DPI. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	xserver-xorg-video-nouveau (Ubuntu)	New	Undecided	Unassigned

Bug Description

Binary package hint: xserver-xorg-video-nouveau

With the nouveau driver, my screen is forced to 96 DPI (as reported by ‘xdpyinfo | grep resolution’), and fonts look too small. This did not happen with the binary nvidia driver, which correctly detects my 129×127 DPI display.

From /var/log/Xorg.0.log, it seems that the driver is detecting the correct panel size from EDID, but overriding it with a size computed from 96 DPI for no apparent reason:

[ 11339.840] (II) NOUVEAU(0): EDID for output LVDS-1
[ 11339.840] (II) NOUVEAU(0): Manufacturer: LPL Model: 1479 Serial#: 0
[ 11339.840] (II) NOUVEAU(0): Year: 2005 Week: 0
[ 11339.840] (II) NOUVEAU(0): EDID Version: 1.2
[ 11339.840] (II) NOUVEAU(0): Digital Display Input
[ 11339.840] (II) NOUVEAU(0): Max Image Size [cm]: horiz.: 33 vert.: 21
[ 11339.840] (II) NOUVEAU(0): Gamma: 2.20
…
[ 11340.081] (**) NOUVEAU(0): Display dimensions: (330, 210) mm
[ 11340.081] (**) NOUVEAU(0): DPI set to (129, 127)
[ 11340.081] (II) Loading sub module "fb"
…
[ 11340.201] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 11340.201] (II) NOUVEAU(0): Setting screen physical size to 444 x 277
[ 11340.201] resize called 1680 1050

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xserver-xorg-video-nouveau 1:0.0.16+git20100518+4b8f1a0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-6.8-generic 2.6.35-rc3
Uname: Linux 2.6.35-6-generic x86_64
NonfreeKernelModules: openafs wl
Architecture: amd64
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1680x1050 1680x1050 1400x1050 1280x1024 1280x960 1152x864 1024x768 800x600 640x480 720x400 640x400 640x350
edid-base64: AP///////wAyDHkUAAAAAAAPAQKAIRV4ChlFl1hTiygkUFQAAAABAQEBAQEBAQEBAQEBAQEBqC+Q4GAaEEAgQBMAS88QAAAZAAAAAAAAAAAAAAAAAAAAAAAAAAAA/gBMR1BoaWxpcHNMQ0QKAAAA/gBMUDE1NFcwMi1UTDA5AJU=
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
Date: Wed Jun 30 16:04:20 2010
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release Candidate amd64 (20091020.3)
MachineType: LENOVO 0768AJU
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-6-generic root=/dev/mapper/btree-ubuntu ro i8042.reset cgroup_disable=memory apparmor=0 crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcEnviron:
PATH=(custom, user)
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: xserver-xorg-video-nouveau
dmi.bios.date: 06/04/07
dmi.bios.vendor: LENOVO
dmi.bios.version: 61ET37WW
dmi.board.name: CAPELL VALLEY(NAPA) CRB
dmi.board.vendor: LENOVO
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnLENOVO:bvr61ET37WW:bd06/04/07:svnLENOVO:pn0768AJU:pvr3000N100:rvnLENOVO:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:
dmi.product.name: 0768AJU
dmi.product.version: 3000 N100
dmi.sys.vendor: LENOVO
make.log:
DKMS make.log for openafs-1.5.74.1 for kernel 2.6.31-11-rt (x86_64)
Wed Jun 30 13:05:38 EDT 2010
system:
distro: Ubuntu
codename: maverick
architecture: x86_64
kernel: 2.6.35-6-generic

Tags:

Revision history for this message

Anders Kaseorg (andersk) wrote on 2010-06-30:

BootDmesg.txt Edit (53.2 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (28.7 KiB, text/plain; charset="utf-8")
DRM.card0.TV.1.txt Edit (124 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (2.6 KiB, text/plain; charset="utf-8")
DkmsStatus.txt Edit (1.0 KiB, text/plain; charset="utf-8")
GdmLog.txt Edit (19.0 KiB, text/plain; charset="utf-8")
GdmLog1.txt Edit (19.1 KiB, text/plain; charset="utf-8")
GdmLog2.txt Edit (21.5 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (13.2 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (459 bytes, text/plain; charset="utf-8")
PciDisplay.txt Edit (735 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.4 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (4.2 KiB, text/plain; charset="utf-8")
RelatedPackageVersions.txt Edit (204 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (104.2 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (221.4 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (28.4 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (29.1 KiB, text/plain; charset="utf-8")
Xrandr.txt Edit (4.3 KiB, text/plain; charset="utf-8")
glxinfo.txt Edit (18.9 KiB, text/plain; charset="utf-8")
monitors.xml.txt Edit (1.1 KiB, text/plain; charset="utf-8")
setxkbmap.txt Edit (355 bytes, text/plain; charset="utf-8")
xdpyinfo.txt Edit (17.3 KiB, text/plain; charset="utf-8")
xkbcomp.txt Edit (57.5 KiB, text/plain; charset="utf-8")

Revision history for this message

Anders Kaseorg (andersk) wrote on 2010-06-30:

I should also mention that this also happens just by starting X from the console with no clients running inside it (so it is not GNOME resizing the screen or anything like that).

It happens with both the stock maverick packages and today’s xorg-edgers PPA.

Revision history for this message

Chris Halse Rogers (raof) wrote on 2010-07-01: Re: [Bug 600374] Re: nouveau forces screen to 96 DPI

duplicate 589485

This is actually done at the Xserver level. Marking as duplicate of the
xserver bug.