I can confirm this with another HP 6510b.. Only that the crash happens immediatedly after pushing the lid down.. If you open the lid you'll see a frozen screen. However the lid closing doesn't always trigger the crash.. For example I can press the lid button many times and almost randomly it crashes.
Only thing I can think of to help is to add some "sync" commands in to /etc/acpi/lid.sh and power.sh...
I can confirm this with another HP 6510b.. Only that the crash happens immediatedly after pushing the lid down.. If you open the lid you'll see a frozen screen. However the lid closing doesn't always trigger the crash.. For example I can press the lid button many times and almost randomly it crashes.
Only thing I can think of to help is to add some "sync" commands in to /etc/acpi/lid.sh and power.sh...