[Intel Arrandale,Mobile 4 Series] Video corrupted when connecting external displays

[Ara Pulido]

This is part of the master bug 824099

When connecting an external monitor, external screen is entirely black, except for the top panel, and the built-in display shows a "dead zone" on the top fourth of the screen, while the bottom 3/4ths are alive and well. I'm attaching a screenshot of the internal display of an affected Intel machine.

Affected systems and GPUs:
Dell Vostro 1014 (Intel Mobile 4 Series)
Dell Vostro 1015 (Intel Mobile 4 Series)
Lenovo Thinkpad Edge 11 (Intel Arrandale)
Lenovo Thinkpad Edge 15 (Intel Arrandale)
Lenovo Thinkpad SL410 (Intel Mobile 4 Series)
Lenovo Thinkpad L412 (Intel Arrandale)
Dell Vostro 1520 (Intel Mobile 4 Series)
Dell Vostro 1720 (Intel Mobile 4 Series)
Dell Inspiron 1545 (Intel Mobile 4 Series)
Dell Vostro 3300 (Intel Arrandale)
Dell Vostro 3500 (Intel Arrandale)
Dell Vostro 3700 (Intel Arrandale)
Toshiba Tecra A11/M11 (Intel Arrendale)
Dell Latitude 13 (Intel Mobile 4 Series)
Dell Vostro 3400 (Intel Arrandale)
Dell Vostro V13 (Intel Mobile 4 Series)
Dell Vostro 3500 (Intel Arrandale)
Dell Vostro V13 (Intel Mobile 4 Series)
Dell Vostro 3700 (Intel Arrandale)
Toshiba Tecra R700 (Intel Arrandale)
Dell Inspiron 15R (Intel Arrandale)
HP ProBook 6550b (Intel Arrandale)

[Jay Taoko (jaytaoko)]

I remember fixing this issue at least a month ago...

I did a fresh install on my core i3 330M today and updated the system. I plugged in an external monitor (max res 1280x1024). I cannot reproduce the issue as reported here.
I am using a Ubuntu downloaded from the daily repository on the 14 of august...

[Daniel Manrique (roadmr)]

Hi Jay,

Maybe somehow the changes didn't make it in time? all the reports for this and related bugs were generated with Oneiric Alpha 3.

Anyway, I just retested this with the Oneiric image from 20110823. Tests were done with Intel Corporation Core Processor Integrated Graphics Controller (rev 12) graphics on a Toshiba Tecra A11.

Behavior is now improved and I can't reproduce the original problem. works mostly OK, I get a compiz crash but it respawns and dual monitors work fine.

Please let me know if I need to test something more specific.

[Ara Pulido (ara)]

Hello Daniel,

Could you test one of the affected systems again with Alpha3, please? Just to double check that it was not a random issue.

Also, could you please file another bug for the compiz crash, please?

Thanks!

[David Barth (dbarth)]

Is this bug still active? I thought it was due to an installation error.

[Daniel Manrique (roadmr)]

I reinstalled Oneiric Alpha3 on one Arrandale system (Toshiba Tecra A11) to try and reproduce the original problem. It does occur exactly as originally described, with the primary display showing a "dead area" on the top 1/3 of the screen, and the secondary display being black except for the top panel.

I'm currently installing from latest image (20110906) to try and reproduce the compiz crash and file about that, if needed.

[Daniel Manrique (roadmr)]

OK, I installed from latest image (20110906) and I'm not getting any Compiz crashes anymore. No need to file a bug about that then, and I'll mark this Fix Released as external screen support is working OK on the latest images.

[Venkatesh Damodar (meetuatvenki-com)]

even i have da same prob
my lspci|grep -i vga is returning
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09)