Re: [REGRESSION] 3.4-rc* radeon: No DVI-A output after commit e00e8b5e760cb

At Wed, 18 Apr 2012 14:39:54 +0200, Takashi Iwai wrote:

Hi,

I noticed that one machine here gives only the blank output with 3.4-rc's. The bisection lead me to affecting commit:

commit e00e8b5e760cbbe9067daeae5454d67c44c8d035
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Mar 16 12:22:09 2012 -0400

drm/radeon/kms: fix analog load detection on DVI-I connectors

Reverting this commit helped, it goes back to normal.

On this system, the VGA monitor is connected to DVI over a VGA-DVI connector (and even VGA-switcher). So, yeah, it's a strange setup. But a regression is a regression.

Looking at the commit again, it appears like a simple logic failure. It should be "&&" instead of "||".

Takashi