Acpi suspend - screen does not wake up

Frantisek Farka frantisek at
Wed Oct 24 20:50:27 UTC 2012


I have recently installed freebsd-9.1RC on my thinkpad t420i laptop and
I have run into some problems regarding acpi suspend/resume.

When I run 

# acpiconf -s 3

Computer seem to suspend correctly, but when I wake it up, laptop seems
to resume correctly except the screen stays dark.

I have made dmesg dump after boot with verbose booting:

and acpidump:

I tried to boot without acpi, but the system did not boot at all.

I have also tried suspend with

# sysctl debug.acpi.suspend_bounce=1

and this is a resulting dmesg during suspend:

I haven't found any problem connected to LCD/screen or something like
that. Do you have any idea what to do in order to make suspend/resume


Frantisek Farka

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