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I'm really sorry for this, because I've seen quite a few different posts about this, but none of them seem to solve my issue.

I have a relatively old Sony laptop, running Ubuntu 13.04, with the "Mobile Intel® GM45 Express Chipset x86/MMX/SSE2" driver.

When I plug in my external monitor (Samsung SyncMaster T240) via HDMI, the laptop freezes entirely. I can't move the mouse and keyboard is unresponsive. The only thing I can do is a hard shut down.

Any help appreciated.

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closed as off-topic by Jorge Castro, guntbert, Braiam, Eric Carvalho, LiveWireBT Nov 3 '13 at 9:04

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – Jorge Castro, guntbert, Braiam, Eric Carvalho, LiveWireBT
If this question can be reworded to fit the rules in the help center, please edit the question.

This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. Did you try with a live CD/USB of 13.10? –  guntbert Nov 2 '13 at 20:43