[i945] Display shifted down (Kubuntu on Acer Aspire One)

[Mark Greenwood]

Binary package hint: xorg

Kubuntu Jaunty Alpha 5 with all updates

uname -a
Linux titch 2.6.28-8-generic #28-Ubuntu SMP Thu Mar 5 21:49:36 UTC 2009 i686 GNU/Linux

apt-cache policy xserver-xorg
xserver-xorg:
  Installed: 1:7.4~5ubuntu13
  Candidate: 1:7.4~5ubuntu13
  Version table:
 *** 1:7.4~5ubuntu13 0
        500 http://gb.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

lspci | grep Display
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)

The display on this machine is shifted downwards about 50 pixels - there is a black bar at the top of the screen, and the bottom few pixels are lost off the bottom of the screen.

I tried xvidtune, but every set of parameters I tried it told me they weren't supported.

According to xvidtune the ModeLine being used by the X server is:
1024x600 47.60 1024 1040 1045 1285 600 603 608 635

From what I can tell, this is wrong. I took the following from a Mandriva install on the same machine, where the display is correctly placed:

    ModeLine "1024x600_60" 48.96 1024 1064 1168 1312 600 601 604 622 -HSync +Vsync

Which gives a perfectly positioned display with a refresh rate of 60Hz. Under Kubuntu, KDE is reporting the refresh rate as 58.3Hz.

I tried putting the above ModeLine in my xorg.conf on Kubuntu, but X just ignores it.

[Mark Greenwood (fatgerman)]

Update - I just tried the Jaunty netbook remix and this suffers the same issue.

[Eduardo Cereto (dudus)]

I can't reproduce this bug in Ubuntu, this is probably something
Kubuntu related.

On Sat, Mar 14, 2009 at 10:33 PM, Mark Greenwood <email address hidden> wrote:
> Update - I just tried the Jaunty netbook remix and this suffers the same
> issue.
>
> --
> Display shifted down (Kubuntu on Acer Aspire One)
> https://bugs.launchpad.net/bugs/339649
> You received this bug notification because you are a member of Ubuntu
> Aspire One team, which is a direct subscriber.
>
> Status in “xorg” source package in Ubuntu: New
>
> Bug description:
> Binary package hint: xorg
>
> Kubuntu Jaunty Alpha 5 with all updates
>
> uname -a
> Linux titch 2.6.28-8-generic #28-Ubuntu SMP Thu Mar 5 21:49:36 UTC 2009 i686 GNU/Linux
>
> apt-cache policy xserver-xorg
> xserver-xorg:
>  Installed: 1:7.4~5ubuntu13
>  Candidate: 1:7.4~5ubuntu13
>  Version table:
>  *** 1:7.4~5ubuntu13 0
>        500 http://gb.archive.ubuntu.com jaunty/main Packages
>        100 /var/lib/dpkg/status
>
> lspci | grep Display
> 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
>
> The display on this machine is shifted downwards about 50 pixels - there is a black bar at the top of the screen, and the bottom few pixels are lost off the bottom of the screen.
>
> I tried xvidtune, but every set of parameters I tried it told me they weren't supported.
>
> According to xvidtune the ModeLine being used by the X server is:
> 1024x600  47.60  1024 1040 1045 1285   600  603  608  635
>
> >From what I can tell, this is wrong. I took the following from a Mandriva install on the same machine, where the display is correctly placed:
>
>    ModeLine "1024x600_60"  48.96  1024 1064 1168 1312  600 601 604 622  -HSync +Vsync
>
> Which gives a perfectly positioned display with a refresh rate of 60Hz. Under Kubuntu, KDE is reporting the refresh rate as 58.3Hz.
>
> I tried putting the above ModeLine in my xorg.conf on Kubuntu, but X just ignores it.
>

--
Eduardo Cereto Carvalho

key: 0xFFFE6B74

[Mark Greenwood (fatgerman)]

>> I can't reproduce this bug in Ubuntu, this is probably something Kubuntu related.

But I *can* reproduce it in Ubuntu as well as Kubuntu. So I wonder if there are different variants of this hardware and it doesn't work on some? Mine is the 1GB/16GB SSD, 8", UK version.

[Dimitrios Symeonidis (azimout)]

raising the importance to medium

[Dimitrios Symeonidis (azimout)]

please provide the output of lspci -vvnn
thank you

[Mark Greenwood (fatgerman)]

lspci output attached as requested. Thanks

[Dimitrios Symeonidis (azimout)]

reassigning to xserver-xorg-video-intel

[Dimitrios Symeonidis (azimout)]

mark, I imagine that you only get this "shift" inside the x server. if you switch to another tty, the prompt should be at the top of the screen, am I correct?

also, do you have compiz enabled? if yes, could you please also try without?
thank you

[Mark Greenwood (fatgerman)]

Yes you are correct - on switching to another tty I can see that the screen is correctly positioned.

I do not have compiz enabled. I'm using kwin effects, but the problem is the same if I turn them off.

Thanks.

[Dimitrios Symeonidis (azimout)]

sorry i forgot to ask this earlier, could you also please attach your /var/log/Xorg.0.log and your current /etc/X11/xorg.conf files...

Also, if you haven't done this already, try with an empty xorg.conf file. Attach Xorg.0.log from that attempt, too.

Thank you, and good luck

[Mark Greenwood (fatgerman)]

My current xorg.conf is virtually empty anyway. This is also what I get if do dpkg-reconfigure -phigh xserver-xorg.
I will attach that and my Xorg.0.log

[Mark Greenwood (fatgerman)]

xorg.conf that goes with Xorg.0.log above

[Mark Greenwood (fatgerman)]

For reference, this is an xorg.conf that was generated when I had Mandriva (also with KDE 4.2.1) installed on this same machine. On this installation the screen was not displaced. This Mandriva installation uses a different version of X; I tried this xorg.conf on my Kubuntu installation but it made no difference to the problem, this version of X ignores nearly everything in the file. Notice how the ModeLines probed by Mandriva (using gtf) and different from the ones in the Xorg log from Ubuntu I attached above.

[Dimitrios Symeonidis (azimout)]

The error from your Xorg.0.log is:
(EE) intel(0): Unknown EDID version 0

[Mark Greenwood (fatgerman)]

So, what does that mean? Is there anything I can do to fix it? I don't know what an EDID is.

[Mark Greenwood (fatgerman)]

I've just applied today's updates and the problem appears to be fixed!

[Mike922 (mike-bronosky)]

Mark Greenwood ask
So, what does that mean? Is there anything I can do to fix it? I don't
know what an EDID is.

see
http://en.wikipedia.org/wiki/Extended_display_identification_data

Mike

--
Taking up Linux Ubuntu and give-up the Windows habit. Hasta la Vista
Moving forward...
Mike Bronosky
<email address hidden>

[Dimitrios Symeonidis (azimout)]

marking as fix released, as per your last comment
thank you, and good luck

[botto (martin-martinmoen)]

Currently getting this issue in ubuntu 8.10 After the updates, before the updates its fine, after, there is a shift.