marcan changed the topic of #asahi to: Asahi Linux: porting Linux to Apple Silicon macs | "Does XXX work yet?": https://alx.sh/fs | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Topics: #asahi-dev #asahi-re #asahi-gpu #asahi-alt #asahi-stream #asahi-offtopic | Keep things on topic | Logs: https://alx.sh/l/asahi
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<atomic-bomb123>
hi
<atomic-bomb123>
has anyone here managed to change the touchpad sensitivity using a hwdb entry? I remember I tried this long ago but I couldn't get it to work.
<atomic-bomb123>
what I mean by sensitivity is the amount of pressure to register as a tap when tap to click is enabled
<atomic-bomb123>
apparently the LIBINPUT_ATTR_PRESSURE_RANGE property should work for this
<atomic-bomb123>
I can see the values I want are registered as up/down in the output of `libinput measure touchpad-pressure` if I set the `--touch-thresholds=xx:xx` to the values I want but I'm not sure of the hwdb match selector I should use, libinput documentation website and man page have different formats, some starting with "libinput", "touchpad" as well as "dmi" so I don't know which one I'm supposed to use or if it's hardware specific which one should/can be
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<chadmed>
the driver does not support this yet
<Zeroine>
aw =/, well thanks
<chadmed>
oh actually it should
<chadmed>
sorry i misinterpreted what you were trying to do
<atomic-bomb123>
oh
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<chadmed>
its not going to be dmi because these machines dont have dmi
<Zeroine>
yeah, thought so because I couldn't find it
<Zeroine>
the new property should be showing up in `udevadm info -q property /sys/class/input/eventX` right? There's no LIBINPUT_ATTR_PRESSURE_RANGE for me after reloading the hwdb with `systemd-hwdb reload`, `udevadm trigger /sys/class/input/eventX` and restarting the compositor
<Zeroine>
I'll send the hwdb I'm using 1 sec
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<atomic-bomb123>
here's what it looks like and the bus, vendor and product ID for the touchpad I found using evemu-describe https://bpa.st/T6TXC
<atomic-bomb123>
and if I test it, a tap pressure is unchanged and registers a click/down at much lower pressure than what it registered as down in `libinput measure touchpad-pressure --touch-thresholds 80:40`
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<atomic-bomb123>
tried it without the "libinput" prefix as well like in `man hwdb` and nothing changed either
<chadmed>
did you trigger a reload of udev?
<chadmed>
also please check that the click is actually registered by libinput as a mouse click and not just the haptic
<chadmed>
i dont think changing the haptic is actually implemented yet
<atomic-bomb123>
by reload you mean the `systemd-hwdb reload` and `udevadm trigger /sys/class/input/eventX`? then yes.
<atomic-bomb123>
I don't understand what you mean by the haptic/mouse click thing
<chadmed>
is a click actually being registered at the "wrong" threshold?
<atomic-bomb123>
a click on the touchpad? it looks like it's unchanged, it doesn't need any extra pressure, just after I press it so it makes the sound it acts as a click
<atomic-bomb123>
and a tap is also unchanged, no extra pressure needed, just a light tap will act as a click, which is what I don't want
<PaulFertser>
The sound is fake click, it's that haptic feedback.
<chadmed>
yeah this is what im trying to get at
<atomic-bomb123>
yeah I knew that but what about it?
<chadmed>
it cant be changed and has nothing to do with that libinput attribute
<chadmed>
libinput has some vestigial support for so-called clickpads but its immature and not exposed in any DE yet
<PaulFertser>
You're changing sensitivity of the library but the haptic feedback might still be there, it's generated separately and is unaffected by your tweaks.
<chadmed>
we need to work on that
<chadmed>
im pretty sure the driver/touchpad firmware sends a click event itself anyway, which means we need to implement the functionality to change the trackpad's idea of that threshold
<PaulFertser>
First time I played with mac clickpad I really had hard time believing it's not a true click, it feels so real, amazing idea and implementation.
<atomic-bomb123>
but I wanna change the tap pressure not the click pressure
<atomic-bomb123>
by click I mean like the one with haptic feedback
<atomic-bomb123>
it's not possible to then?
<atomic-bomb123>
sorry if I am causing confusion =///
<PaulFertser>
Do you want to disable UI reaction to light taps altogether?
<chadmed>
also did you restart your session
<atomic-bomb123>
no no, I enabled tap to click in the sway compositor but the taps are so sensitive they make me click away from what I'm typing pretty often
<atomic-bomb123>
that's why I wanted to change the sensitivity to lower so I need to tap harder for it to cause a click somewhere
<PaulFertser>
With "evtest" you can observe data as it comes from the kernel directly. Then you can probably read through libinput sources or enable some debug there to see how the settings affect processing.
<atomic-bomb123>
chadmed: yeah I restarted my compositor and tried rebooting as well after the hwdb reload
<atomic-bomb123>
PaulFertser: thanks, I'll try that
<PaulFertser>
atomic-bomb123: sorry it's not really an answer but at least that would give you an idea if the hardware provides different reports for different lightness of taps and related info.
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<atomic-bomb123>
yeah =)
<PaulFertser>
Because libinput can only work with the stream as produced by the kernel so peeking inside there as the first step of investigating sounds natural.
<atomic-bomb123>
do any of you use tap to click on asahi by the way? no issues like this?
<chadmed>
i personally cant stand tap to click so i dont use it
<chadmed>
but it should work regardless
<atomic-bomb123>
ah
<PaulFertser>
I guess atomic-bomb123 has it working but the problem is probably palm detection not disabling it during typing?
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<PaulFertser>
Or how do you manage to tap accidentally?
<atomic-bomb123>
yeah
<atomic-bomb123>
on macos I didn't have these accidental taps, maybe they have better palm detection, I don't know
<PaulFertser>
You macbook folks have touchpads too big :)
<atomic-bomb123>
haha I guess yeah
<PaulFertser>
I think libinput calls it "dwt" aka "disable while typing" feature and there was some post about it being inadequate for mac hardware.
<PaulFertser>
chaos_princess: you once mentioned you can try helping with finding posts on social.treehouse.systems , I have a feeling there was something insightful about palm detection / disable while typing.
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<chaos_princess>
mind giving a few more keywords to look for?
<PaulFertser>
IIRC it was about disabing software palm detection in favour of some feature that firmware provides better. But it might be the post also had some other essential hints regarding the topic.
<PaulFertser>
It was by m arcan or someone else in the core team.
<PaulFertser>
that MR is likely related but IIRC the post was a bit more elaborate
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<pitust>
dooes the m1n1 hypervisor adjust SPSel in any of the exception vectors? it seems to me that it just goes with whatever the guest stack is, which is obviously broken...
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<sven>
m1n1 works quite fine so it can’t be „obviously broken“
<sven>
why do you think it needs to adjust spsel?
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<pitust>
sven: if EL1 set SPSel=0 then entered possibly malicious EL0, then EL0 does something that goes to EL2, m1n1 seems to put random stuff on top of the stack?
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<pitust>
my understanding is linux runs with SPSel=1
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<sven>
right, but in exception entry the old pstate is copied to SPSR_EL and then pstate.sp is set to one so all that doesn’t matter
<sven>
*on
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<pitust>
ohhh okay
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