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HP Compaq 2510p linux kernel freeze

I've recently noticed that one of our lab laptops running "testing" and "unstable" <strong>freezes</strong> the system whenever i close
the lid.

Additionally, X does not always come up properly and rebooting is (besides typing blindly) the only way to get a
graphical login. The graphics chipset is an intel 955.

After a bit of search we found a kernel bugreport, which provides a clue
where the problem occurs.

root@orion:~# cat /proc/acpi/video/*/DOS
DOS setting: <0>

To get it working for the HP Compaq 2510p, all you need to do is to set a value of "1"

root@orion:~# echo '1' > /proc/acpi/video/*/DOS

Then cross your fingers and close the lid.

Hopefully your system did no freeze and is still up ;-)

At work, we're using a modprobe post-install-Script to work around this which sets the working ACPI _DOS value if a ''ACPIvideo_DOS'' variable is set. This will hopefully be fixed soon in a newer kernel version.

Afaik from Debconf8, Bdale also owns one of those notebooks.

PS.: *rofl*

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Hopefully your system did no

Hopefully your system did no freeze and is still up....
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HP Compaq 6720s

The same. Lid closed = system freezed. Your solution works perefectly. I have been searching for that for past three months. Thank you!:)

Yes, I currently carry an HP

Yes, I currently carry an HP 2510p notebook. However, I'm running a locally-compiled 2.6.27.4, and I don't even have a /proc/acpi/video, so clearly I'm running a different driver mix than you are.

This fix cures two problems my wife has been having with her slightly-older nc2400 running lenny. The system would freeze when the AC adapter was unplugged, and the lock-on-lid-close wasn't reliable. Both seem to be better with this config change.

Thank you!

Bdale

Same experience

I've been haunted by this with my HP 6910p as well - there's even bugreport I've made (with several possible workarounds suggested), http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=503465

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