[Bug 644714] Re: Screen corruption waking from screen blank if no monitor present

[Ricardo Salveti]

@Tobin: are you sure you faced this issue with the dmesg you post at
comment #2? Here the HDMI code is probing the EDID correctly 2 times,
and setting your resolution as 1440x900.

This issue happens because of the new size_notify API added by Rob Clark
with latest merge. With the latest API every time the hdmi driver wakes
up it'll try to probe the EDID again (in case you switched monitors),
and if it finds a different resolution, it'll set the new size at the
framebuffer driver. While this feature works correctly for the
framebuffer driver, the X11 fbdev doesn't support it, and will continue
using the resolution it got when starting X11.

If you restart X11 you'll see that it'll work again with the proper
resolution.

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Screen corruption waking from screen blank if no monitor present
https://bugs.launchpad.net/bugs/644714
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