screen dead after resume on Thinkpad X30

[Lutz Boehne]

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Hello,

I'm tracking RELENG_6 and after one upgrade, my Thinkpad X30 does not
properly wake up out of standby anymore. After waking up, the laptop
will still respond to key presses and I am able to reboot it by pressing
Ctrl-Alt-Del, but nothing will appear on the screen until I see the BIOS
POST.

I spent some time to narrow down which changes in RELENG_6 seem to be
responsible and found out that RELENG_6 from August 16th 2006 12:01am
works fine and that RELENG_6 from 08:00pm that day does not.

Candidate files are:
src/sys/dev/acpica/acpi_video.c
src/sys/i386/acpica/acpi_machdep.c
src/sys/i386/acpica/acpi_wakecode.S
src/sys/i386/acpica/acpi_wakeup.c

I locally replaced those files in today's RELENG_6 with versions from
before August 16th, built/installed kernel and world and resume works
properly again.

If anybody would like to investigate further, I'd gladly supply more
information, just let me know what you need.

Best regards,

Lutz

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