On 05/10/2011 10:17 AM, Andy Grover wrote: > I just got an Edge e220s, and am having some issues. If I press Fn-F7 > (lower screen brightness) two times or Fn-F8 (increase brightness) the > laptop freezes up solid. I get an unhandled HKEY 0x6050 message from > Fn-F7 the first time I press it, but I'm not thinking thinkpad_acpi is > the culprit, since the behavior is the same (2nd F7, 1st F8 freezes > laptop) even without the module loaded. > > Do you have any advice or insight into this issue, or how to diagnose > the cause of this issue? [ccing linux-acpi too] Self-replying.. Apparently the hang is ACPI-related, it only happens when using ACPI backlight controls. It works if acpi=off, but that's not really a good solution these days. I think this means I'm out of luck without a BIOS update -- the backlight ASL (avail on request) ends up calling a "SMI" method, so the trail ends there. I also found out that blacklisting the video module doesn't work, perhaps because i915 depends on it? Another weird thing is that acpi_backlight=vendor causes it to hang, right before gdm screen comes up, so that's not an option either, alas. Cmon Lenovo bios people, I thought you had a clue! Regards -- Andy ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
