I set my BIOS settings to match yours, but still no joy - the laptop
freezes on any operation that involves changing the display brightness.
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I updated BIOS to 1.22 but still have the same problem. I'm testing
Kubuntu (11.04) right now, and the same problem is present there as
well.
Robin: Do you have the 2000M card or the 1000M? I'm with 1000M here.
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Desktop
Disabling the Wireless card in the BIOS does not solve the problem for
me. Even with disabled Wireless when the laptop freezes instantly when I
change the brightness in the GUI.
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I removed the nvidia drivers coming with the distro, and installed the
latest 64bit drivers from the Nvidia website (270.41.06) just in case.
Problem still persists.
I then removed those drivers, and installed the nouveau driver via apt.
Problem still persists.
Sumary: This problem does not seem
Public bug reported:
Binary package hint: gnome-power-manager
I got the latest Ubuntu installed on a Lenovo W520 with graphics set to
Nvidia discrete card. The laptop freezes, however, on power-management
actions, such as brightness change and sleep/wake-up. A particularly
annoying problem is
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https://bugs.launchpad.net/bugs/776999
Title:
Lenovo W520 laptop freezes on ACPI-related actions
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Forgot to add... this freeze also occurs when the system is switched
from AC to battery power, as well as when it is booted on battery. My
wild guess is that this is related to automatic change to the brightness
settings. Basically the system is not usable on battery power.
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