On 2015-06-27 00:49, Henrique de Moraes Holschuh wrote: > On Fri, 26 Jun 2015, Hui Wang wrote: >>> Again, I'm on a X121e, and that has only a single physical LED for >>> signaling the power state. The mute button is behind key combination of >>> the keyboard. >>> >>> Jan >> There is no reason to change a power button to a reset button after >> accessing the acpi device "SSMS", the "SSMS" is for the mute led instead of >> the power management. >> >> I think it is better you login to the lenovo website and look for the latest >> BIOS image, then upgrade the BIOS on your machine to see if it can solve the >> problem or not. > > Hmm, I think I am missing something here. > > Please explain _in detail_ what you mean with "changing a power button to a > reset button by acessing the SSMS ACPI method in a X121e". > > Are we trigering a bug somewhere that crashes the x121e and causes it to > reboot?
Well, there aren't much details to describe in this case: When this patch is applied and I press the power button, the device performs a hard reset. It doesn't reveal if the kernel crashes catastrophically, causing a triple fault or so, or if the firmware decides to reset the platform. Reverting the patch or preventing its effect via a quirk filter like I posted [1] makes the issue go away. Jan [1] http://mailman.alsa-project.org/pipermail/alsa-devel/2014-June/078284.html
signature.asc
Description: OpenPGP digital signature