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I am able to get an external VGA monitor (or projector) to work if I start my laptop with it connected. However, if I start the laptop with it disconnected there is no signal on the external. The Displays screen shows the external, and thinks that it is active, but there is no signal being sent to it. This has been a persistent problem since 10.04 (I am now on 12.04.... each upgrade hoping something is improved).

I should note that even when it works (starting with display connected), Displays still says the monitor is "unknown" (but it sends the signal). For the correct resolution to display, I have had to add a few xrandr lines for my monitor to my .xprofile file... otherwise resolution is limited to default 1024x768. So, resolution issues can be worked around, but the main issue is that the external doesn't get a signal without starting the machine with it connected.

I have tried:

adding i915.modeset=1 to grub (also i965.modeset=1 since someone posted that this helped even though lshw shows i915)

adding following ppa and doing a dist-upgrade: sudo add-apt-repository ppa:xorg-edgers/ppa

Here are the details:

Laptop: Toshiba Tecra M10

lspci listings for video:

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)

sudo lshw -C video listing:

*-display:0
     description: VGA compatible controller
     product: Mobile 4 Series Chipset Integrated Graphics Controller
     vendor: Intel Corporation
     physical id: 2
     bus info: pci@0000:00:02.0
     version: 07
     width: 64 bits
     clock: 33MHz
     capabilities: msi pm vga_controller bus_master cap_list rom
     configuration: driver=i915 latency=0
     resources: irq:46 memory:ff400000-ff7fffff memory:e0000000-efffffff ioport:cff8(size=8)
*-display:1 UNCLAIMED
     description: Display controller
     product: Mobile 4 Series Chipset Integrated Graphics Controller
     vendor: Intel Corporation
     physical id: 2.1
     bus info: pci@0000:00:02.1
     version: 07
     width: 64 bits
     clock: 33MHz
     capabilities: pm bus_master cap_list
     configuration: latency=0
     resources: memory:ffc00000-ffcfffff

"System Info" shows my graphics as the following

Mobile Intel® GM45 Express Chipset x86/MMX/SSE2 
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closed as too localized by Eliah Kagan, fossfreedom Jan 13 '13 at 11:08

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

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This question appears to be abandoned. Unaccepted answer or unanswered, could you perhaps add more detail to your question? If this question no longer applies then you can either delete it or answer it yourself if you've solved the problem. Flagged for deletion. Thanks! –  Ringtail Jan 13 '13 at 0:26
    
Well, far from abandoned I remain actively facing this issue every day. I don't know how to add more detail. I think it is a problem of the graphics drivers, but nothing works so far. I don't see why a "difficult to solve problem" should be deleted, and I wouldn't think "too localized" because this is standard Ubuntu 12.04 and a fairly common chipset.... just others may not use an external display to see the problem. FWIW, same issues when trying to connect an external projector. Only works if booted from cold with physical connection in place. –  rik.shaw Jan 13 '13 at 12:43
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1 Answer 1

I have an old Acer Aspire 4730Z withe the same chip, and a ViewSonic VG2436WM-LED Monitor, which is plugged into the vga port. Love the BIG display!!! Here's my output from sudo lshw -C video.

*-display:0
description: VGA compatible controller product: Mobile 4 Series Chipset Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 07 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:46 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:6110(size=8) *-display:1 UNCLAIMED description: Display controller product: Mobile 4 Series Chipset Integrated Graphics Controller vendor: Intel Corporation physical id: 2.1 bus info: pci@0000:00:02.1 version: 07 width: 64 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: latency=0 resources: memory:d4500000-d45fffff

The only difference I see is the first resources:.... ioport:6110(size=8). I'm running LinuxMint 11 (katya), Kernel Linux 2.6.38-14-grneric-pae, Gnome 2.32.1.

I'm still trying to get compiz to do four desktops with different wallpaper. Frustrating as hell!

Shot my old PC with Windows XP Professional with a Barrett .50 cal because it kept getting trojans, viruses, and malware, & Microsoft Support was almost useless.

Hope this helps!

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Chris, are you saying it works "out of the box" with being able to "hot plug / unplug"? Furthermore, is your display dimension recognized correctly by default? If so, I may have to do some "testing" with some other distros. I am not interested in going to Mint, but if they get it right "out of the box" it seems that they did something that the Ubuntu team should be able to correct somewhere (?). Thanks again. –  rik.shaw Apr 19 '12 at 8:00
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