Fedora Users — Unreadable external LCD after upgrade to 2.6.32

Unreadable external LCD after upgrade to 2.6.32

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To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>

Subject: Unreadable external LCD after upgrade to 2.6.32

From: Sam Tregar <sam@xxxxxxxxxx>

Date: Tue, 9 Mar 2010 16:12:07 -0500

Delivered-to: users@xxxxxxxxxxxxxxxxxxxxxxx

Reply-to: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>

Hey all. I've got a Dell Latitude E1505 running Fedora F12. I just updated to 2.6.32.9-67.fc12.i686 today and as soon as I rebooted my external LCD was unreadable. It had wavy vertical lines all over it and appeared to have less than the full vertical resolution. The laptop LCD looked fine.

After checking the cable, power-cycling the monitor and reseting its settings, and rebooting a few times didn't help, I booted back into 2.6.31.12-174.2.22.fc12.i686 and all was well again. Any ideas what could cause this and what I might do to fix it?

The display chip on this laptop is an ATI Radeon Mobility X1400 and I'm using the radeon driver. Let me know if I can provide anything that might help - X logs, dmesg, whatever.

Thanks!

-sam

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