Created attachment 97496 [details]
dmesg with dri.debug=4
I have a behaviour very similar to https://bugs.freedesktop.org/show_bug.cgi?id=42960.
After resuming from suspend, display is blank.
I have tried the tricks suggested in #42960 (acpi_sleep=s3_bios) with no luck, when I use that the laptop doesn't resume correctly.
With the catalyst driver the display resumes correctly.
It's an Ubuntu 13.10 with a 3.14 kernel, DPM is activated.
Feel free to ask for tests.
Created attachment 97497 [details]
Created attachment 97498 [details]
*** This bug has been marked as a duplicate of bug 42960 ***