This set of 3 patches makes it a little more likely we'll get panic output onto the screen even when X is running, assuming a KMS enabled stack anyway. It gets me from a blank or very sparsely populated black screen at panic time, to one including the full backtrace and panic output at panic time (tested with "echo c > /proc/sysrq-trigger" from an X session). It doesn't cover every case; for instance I think it'll fail when X has disabled the display, but those cases need to be handled with separate patches anyway (need to add atomic DPMS paths for instance). Anyway, please test these out and let me know if they work for you. -- Jesse Barnes, Intel Open Source Technology Center
