Natty: Acer Veritron N270G screen resolution

[Bengt Nilsson]

Binary package hint: xorg

After upgrading to natty, my screen resolution was maximised to 1024x768, while my monitor is 1280x1024.
The only tool for screen resolution is Monitors.
No proprietory drivers was found.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CurrentDmesg:
 [ 18.680978] tg3 0000:03:00.0: eth0: Flow control is off for TX and off for RX
 [ 18.681416] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
 [ 20.203166] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
 [ 22.456449] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
 [ 28.848011] eth0: no IPv6 routers present
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x768
 edid-base64:
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x1024 1280x1024 1280x960 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
 edid-base64: AP///////wBBDFoIihYAABsRAQMOJh54KqFQo1dMnSURUFS/74BxT4FAgYABAQEBAQEBAQEBMCoAmFEAKkAwcBMAeC0RAAAeAAAA/wBBVTMwNzI3MDA1NzcwAAAA/ABQaGlsaXBzIDE5MEIKAAAA/QA4TB5TDgAKICAgICAgAIc=
Date: Mon May 23 13:35:27 2011
DistUpgraded: Log time: 2011-05-22 11:51:28.953064
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation N10 Family Integrated Graphics Controller [8086:a001] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0403]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Acer Veriton N270G
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=02fe10e5-99f6-45ec-af98-da874fc5ca77 ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to natty on 2011-05-22 (1 days ago)
dmi.bios.date: 05/12/2010
dmi.bios.vendor: Acer
dmi.bios.version: P01-A3
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: TPDS02
dmi.board.vendor: Acer
dmi.board.version: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Acer
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAcer:bvrP01-A3:bd05/12/2010:svnAcer:pnVeritonN270G:pvrToBeFilledByO.E.M.:rvnAcer:rnTPDS02:rvrTobefilledbyO.E.M.:cvnAcer:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: Veriton N270G
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Bengt Nilsson (bengt-nilsson)]

Investigating further, I found that disabling "Monitors/Same image on all screens", reveals that the Veriton regards itself as a "Laptop (1024x768)" with an extra "Philips (1280x1024)" screen. However, selecting the Philips gives a black monitor with a mouse only.
Obviously, it seems there is some severe internal confusion here. The real Philips LCD screen is physically connected to the only existing VGA port.

BN

[Bengt Nilsson (bengt-nilsson11)]

Workaround found:
Disable the "Laptop" screen in Monitors.
Save as default.
Now the VGA-connected Philips 19" LCD works at the desired 1280x1024 resolution.

Works, but it is hardly the clean solution.
Why does Natty think the Acer Veriton N270G is a laptop in the first place? It is a "Nettop", a minimal case with reasonable performance. The Atom D510 processor is common in laptops, yes, but there must be some other reason.

[Bengt Nilsson (bengt-nilsson11)]

I see the word LVDS being used in the Gdmlog.txt
I should look in the BIOS to see if it can be disabled.

[Bryce Harrington (bryce)]

Hey bengt-nilsson,

You filed this bug report against natty, but I see it's still open and
doesn't appear to have much activity recently. So, now that oneiric
is released and stable, this may be a good point for you to upgrade
and re-test if this issue is still present there.

If it's solved in the new release and you think it's worth backporting
the fix, please indicate that. Or if having the fix in the new release
is good enough, feel free to close out the bug (or let us know and we'll
close it.)

If it's not solved, leave the bug report open. I can't promise we'll
get to it (we get way more bugs filed than we can usually get to), but
your testing and feedback can help out if and when we do.

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.

[Bengt Nilsson (bengt-nilsson)]

I am hesitant to upgrade, since this system is in a "production environment".
Previous upgrades to 11.10 have in most cases been disastrous for us.
So I will wait until I am able to have a replacement system prepared for this task.

[alepac (alessandro-pacifici)]

This bug is still present in Ubuntu 12.04 (I just installed the latest LTS) but was not present on ubuntu 10.10.