Comment 20 for bug 745112
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| Roland Dreier (roland.dreier) wrote Re: [arrandale] desktop is messed up (goes black) when laptop is docked with two external 1920x1200 monitors (x86_64) | #20 |
I just noticed something while looking at my Xorg.0.log after a couple of dock/undock cycles leading to the black screen. I'm attaching the full log, but what I noticed was:
boot up undocked:
[ 5.897] (II) intel(0): Allocated new frame buffer 1472x900 stride 6144, tiled
matches a 1440x900 panel
dock:
[ 370.652] (II) intel(0): Allocated new frame buffer 3840x1200 stride 15360, tiled
makes sense, I now have 2x1920x1200 monitors
undock:
[ 414.405] (II) intel(0): Allocated new frame buffer 1472x900 stride 6144, tiled
back to the 1440x900 panel
dock again:
[ 434.873] (II) intel(0): Allocated new frame buffer 1920x1200 stride 7680, tiled
now it only allocates a buffer for one monitor -- which probably explains why the second monitor never lights up
I'm not sure what layer of the stack is responsible for figuring out what buffer to allocate etc but this does seem like the first real clue I've seen to where the problem lies.