Comment 41 for bug 226279

Same symptoms as first reported, on Toshiba A100 - ATI Xpress 200M, ati binary driver. Suspend used to work fine (with 2.6.24-16), but after upgrade to -17 resume is broken. Black screen, no backlight, no HD activity. Magic dont work either. Turning off and back on doesnt restart the laptop, it stays frozen right after power on (no backlight, no HD activity). The only way to get it to boot again is to unplug both AC and battery, plug them back and try again. I tried the -19 kernel without success.
The resume-trace procedure shows:
[ 19.035013] registered taskstats version 1
[ 19.035146] Magic number: 0:968:373
[ 19.035149] hash matches /build/buildd/linux-2.6.24/drivers/base/power/main.c:112
As an aside note, I had to fix resume under 2.6.24-16 to get it to work properly: I had to use "sudo /etc/acpi/sleep.sh force" otherwise it wouldnt resume. But under -17, it doesnt work anymore.