Bug 510057 - display detection does not work
display detection does not work
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-intel (Show other bugs)
All Linux
low Severity medium
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Assigned To: Adam Jackson
Fedora Extras Quality Assurance
Depends On:
Blocks: fitandfinish
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Reported: 2009-07-07 11:15 EDT by Matthias Clasen
Modified: 2009-08-14 15:38 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2009-08-14 15:38:48 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Matthias Clasen 2009-07-07 11:15:13 EDT
On a T61 with 965 graphics.

I plug in an external monitor into the laptops vga port. Then I click Fn-F7 to make my desktop detect the new monitor, but it doesn't. The display flickers, indicating that probing is happening, but the new monitor does not show up.

Same result when using the 'Detect Monitors' button in g-d-p.

Running xrandr shows VGA1 as 'disconnected'.

Switching vts and back makes the external monitor magically come to life. 

After that, it shows up in g-d-p as expected.
Comment 1 Matthias Clasen 2009-07-07 12:22:15 EDT
Surprisingly, plugging a projector into the same laptop works really well.
Comment 2 David Timms 2009-07-08 10:15:58 EDT
(In reply to comment #1)
> Surprisingly, plugging a projector into the same laptop works really well.  
Is it worth noting the manu/model of the working / not working displays ?
Perhaps it is a particular class of displays that are problematic ?
Comment 3 Matthias Clasen 2009-08-14 15:38:48 EDT
This works fine for me now, with the same hardware that I tested at the test day.

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