3 ms·
If I'm reading it right, another LKML message seems to confirm that the muting LED is hardware controlled. From https://lkml.org/lkml/2020/11/3/904 https://lkm
by adrianmonk 6y ago
If I'm reading it right, another LKML message seems to confirm that the muting LED is hardware controlled.
From https://lkml.org/lkml/2020/11/3/904 https://lkml.org/lkml/2020/11/3/904:
> I don't think it came through in the commit message, but I wanted to mention
in the system that prompted this software does not control the LED. The LED
is actually controlled by hardware, but has circuitry to delay the hardware
mute until software mute is complete to avoid any "popping noises".
That's followed by someone asking about a timeout in case software mute never happens (so that hardware mute still does), and the same person confirms there is a timeout.
- labawi 6y agoWithout further details, I remain unconvinced of true hardware security. By hardware I would presume they mean a system/keyboard controller - one that can monitor events, delay and toggle privacy mode. A controller that likely has updateable firmware and could be compromised via SW given sufficient effort (TLA, Dell, &c). The privacy mode might be unsubvertible via SW, but I wouldn't take their word for it.