TP Edge E220s freezes when hotkeys pressed
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Quoted 9 lines · Andy Grover
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
0x6050message from Fn-F7 the first time I press it, but I'm not thinkingthinkpad_acpiis 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