[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #20 from stacktracer  ---
I'm stuck. "udevadm test" shows "LIBINPUT_ATTR_PALM_PRESSURE_THRESHOLD=500",
but "libinput debug-events" shows "palm: pressure threshold is 130".

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #18 from stacktracer  ---
Notably, the cursor still gets stuck when, and only when, "libinput measure"
reports a max pressure above 130. It's very consistent. Maybe my 500 isn't
taking effect after all.

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[Wayland-bugs] [Bug 98839] Somehow conditionalize hysteresis (hardware black/whitelist, device property introspection, user-exposed setting, etc)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=98839

--- Comment #100 from Daniel van Vugt  ---
Excellent, thanks.

I had actually forgotten to report that hysteresis was breaking the X1 Carbon
G5 again...

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[Wayland-bugs] [Bug 98839] Somehow conditionalize hysteresis (hardware black/whitelist, device property introspection, user-exposed setting, etc)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=98839

--- Comment #99 from Peter Hutterer  ---
https://lists.freedesktop.org/archives/wayland-devel/2018-April/038025.html

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[Wayland-bugs] [Bug 106204] Trackpad not precise on X1 carbon 6th gen

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=106204

--- Comment #9 from Peter Hutterer  ---
no, the kernel doesn't do anything other than forward the events. If you switch
to imps, the kernel doesn't switch the touchpad to touchpad mode so the
firmware emulates a PS/2 compatible mouse. You can verify this by running
evemu-record, you should see BTN_LEFT, etc. as well as REL_X/Y.

It's more of a firmware bug in that the device is only ever tested with windows
and if it works there, they ship it. If we don't have the same behaviour as the
windows driver we trigger bugs that windows doesn't have to care about. as you
could see from the libinput vs synaptics behaviour - different pointer
acceleration suddenly shows up a bug that's effectively unfixable without
emulating that behaviour (which can break other devices, yay).

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #23 from Peter Hutterer  ---
commit 59eb10e593213403c301a5ce3fbd0a22b6e52efd
Author: Peter Hutterer <>
Date:   Mon Apr 30 10:40:45 2018 +1000

 util: allow for palm pressure > 255

so grabbing git master should work for running debug-events now

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #21 from Peter Hutterer  ---
This may be caused by a peculiar behaviour of udevadm test: it shows the
properties to be applied but only applies them when being run as root. So make
sure to run as root if you want it to apply the properties too. Check with
udevadm info if the property shows up there? If so but libinput doesn't detect
it, then that's a bug in libinput somewhere.

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #22 from Peter Hutterer  ---
Created attachment 139224
  --> https://bugs.freedesktop.org/attachment.cgi?id=139224=edit
0001-util-allow-for-palm-pressure-255.patch

Sorry, posted to quickly. This one is the reason it doesn't work, an artificial
upper limit.

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[Wayland-bugs] [Bug 106286] NEW: Proposal for mouse scroll wheel disabling while middle click is held.

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=106286

Peter Hutterer  changed:

   What|Removed |Added

 CC||peter.hutte...@who-t.net
 Status|NEW |NEEDINFO

--- Comment #1 from Peter Hutterer  ---
Can you post an example evemu-record of a sequence that's gone wrong? Like how
many inadvertant clicks do you use usually get? Do you get the clicks
before/after the wheel triggers the actual button?

This is a tricky one for libinput because we don't have any user feedback and
making this configurable is a bit pointless. Having it as a hw-specific quirk
is easy enough but it will prevent wheel scrolling with the middle button down.
Which means we'll likely need some extra heuristics like a threshold when we
start scrolling. That again is hard to discover and likely to upset people.

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #16 from stacktracer  ---
For me the palm threshold needs to be set to at least 300. It probably makes
sense to set it even higher (maybe 500?), since this is a desktop touchpad --
separate device, not built into a laptop surface -- so accidental palm contact
practically never happens.

In a few minutes of regular usage, I've seen max pressures in the 70-260 range.

Still trying put together a .hwdb file. The debug procedure page is not very
specific about how to figure out the right values for the match line, so it may
take me a while to figure those out.

libinput version: 1.10.5-1
uname: Linux  4.16.3-1-ARCH #1 SMP PREEMPT Thu Apr 19 09:17:56 UTC
2018 x86_64 GNU/Linux.)

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[Wayland-bugs] [Bug 106313] weston freezes when mouse pointer moved to the left edge of the desktop.

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=106313

anthony  changed:

   What|Removed |Added

   Hardware|Other   |x86-64 (AMD64)

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[Wayland-bugs] [Bug 106310] crash backtrace

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=106310

Bug ID: 106310
   Summary: crash backtrace
   Product: Wayland
   Version: unspecified
  Hardware: Other
OS: All
Status: NEW
  Severity: normal
  Priority: medium
 Component: weston
  Assignee: wayland-bugs@lists.freedesktop.org
  Reporter: dpa-b...@aegee.org

Weston 4.0 crashed with this backtrace:   I use wayland-1.15.0 and
wayland-protocols-1.13:

#0  0x7fc64ce3f60a in __GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51
set = 
{__val = {81926, 0, 140489700286272, 140489556020087,
140489700291456, 140489700504292, 64, 0, 2, 140489700284736, 1,
140489557871911, 140489700130880, 140489700130880, 21454416, 59648}}
pid = 
tid = 
#1  0x7fc64ce406e1 in __GI_abort () at abort.c:79
save_stage = 1
act = 
  {__sigaction_handler = {sa_handler = 0x30, sa_sigaction = 0x30},
sa_mask = {__val = {19337240, 80, 20, 18446744073709551152, 140489693846227,
206158430211, 1315717493, 140489695969600, 140489693846496, 140489695972304,
140489693846227, 27036704, 1315717491, 140489695969624, 140732477818496,
140732477818784}}, sa_flags = -715569536, sa_restorer = 0x1000}
sigs = {__val = {32, 0 }}
#2  0x7fc64ce809a7 in __libc_message (action=action@entry=do_abort,
fmt=fmt@entry=0x7fc64cf83458 "%s\n")
at ../sysdeps/posix/libc_fatal.c:181
ap = {{gp_offset = 24, fp_offset = 0, overflow_arg_area =
0x7ffed55947b0, reg_save_area = 0x7ffed5594740}}
fd = 
list = 
nlist = 
cp = 
written = 
#3  0x7fc64ce86d7a in malloc_printerr (str=str@entry=0x7fc64cf815d6
"corrupted double-linked list")
at malloc.c:5350
#4  0x7fc64ce8a256 in _int_malloc (av=av@entry=0x7fc64d1b8c40 ,
bytes=bytes@entry=744)
at malloc.c:3926
p = 0x7fc64ce3f60a <__GI_raise+202>
iters = 
nb = 752
idx = 
bin = 
victim = 
size = 
victim_index = 
remainder = 
remainder_size = 
block = 
bit = 
map = 
fwd = 
bck = 
tcache_unsorted_count = 
tcache_nb = 752
tc_idx = 45
return_cached = 
__PRETTY_FUNCTION__ = "_int_malloc"
#5  0x7fc64ce8c1e1 in __libc_calloc (n=n@entry=1,
elem_size=elem_size@entry=744) at malloc.c:3436
av = 
oldtop = 0x1aa5200
p = 
bytes = 744
sz = 744
csz = 
oldtopsize = 1064448
mem = 
clearsize = 
nclears = 
d = 
hook = 
__PRETTY_FUNCTION__ = "__libc_calloc"
#6  0x7fc64e6d4c98 in zalloc (size=744) at ./shared/zalloc.h:38
#7  0x7fc64e6d4c98 in weston_surface_create
(compositor=compositor@entry=0x1281160) at libweston/compositor.c:459
#8  0x7fc64e6d8704 in compositor_create_surface (client=0x1943f40,
resource=0x1483580, id=12)
at libweston/compositor.c:3262
ec = 0x1281160
surface = 
#9  0x7fc64e2b060e in ffi_call_unix64 () at
/usr/local/lib/../lib/libffi.so.6
#10 0x7fc64e2af8d9 in ffi_call () at /usr/local/lib/../lib/libffi.so.6
#11 0x7fc64e4bed0c in wl_closure_invoke (closure=0x19c2b50,
flags=, target=, opcode=0, data=)
at src/connection.c:996
cif = 
  {abi = FFI_UNIX64, nargs = 3, arg_types = 0x7ffed5594a50, rtype =
0x7fc64e2b0a00 , bytes = 0, flags = 0}
ffi_types = 
  {0x7fc64e2b08e0 , 0x7fc64e2b08e0
, 0x7fc64e2b0960 , 0x7fc64e2b08e0
, 0x7fc64e2b0960 , 0x7fc64e2b0960
, 0x90, 0x50, 0x19944c0, 0x80, 0x19944b0, 0x7fc64e4c0990,
0x90, 0x7fc64ce8bced <__GI___libc_realloc+205>, 0x1c0, 0x7fc64d1b8c40
, 0x19c2e88, 0x80, 0x1943f70, 0x8, 0x7fc64e4c0990, 0x7fc64e4bdad3
}
ffi_args = 
  {0x7ffed5594a20, 0x7ffed5594a28, 0x19c2b68, 0xc, 0x19c2b70,
0x7fc64e4bf9ef , 0xc, 0x7fc64e4c0e18, 0x7ffed5594ba8,
0x7fc64e4be731 , 0x19c2c2c, 0x19c2e70, 0x19c2c20,
0x19c2c2c, 0x19c2b50, 0x7fc64e4bea20 ,
0x7ffed5594ba0, 0x7fc64e4b9e53 , 0x19c2b50, 0x7fc64e6c4b60
, 0x4a, 0x148356e}
implementation = 
#12 0x7fc64e4bb69f in wl_client_connection_data (fd=,
mask=, data=0x1943f40)
at src/wayland-server.c:420
client = 0x1943f40
connection = 
resource = 0x1483580
object = 0x1483580
closure = 0x19c2b50
message = 0x7fc64e6c4b60 
p = {4, 786432}
resource_flags = 
opcode = 0
size = 
since = 
len = 
#13 0x7fc64e4bcf72 in wl_event_loop_dispatch (loop=0x1278ee0,
timeout=timeout@entry=-1) at src/event-loop.c:641
ep = 
  {{events = 1, data = {ptr = 0x19b0720, fd = 26937120, u32 =
26937120, u64 = 26937120}}, {events = 1, data = {ptr = 0x1427b40, fd =
21134144, u32 = 21134144, u64 = 

[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #17 from stacktracer  ---
Hmm, no joy yet.

I increased the palm threshold, by putting the following in
/etc/udev/hwdb.d/99-logitech-wireless-touchpad-palm.hwdb:

libinput:touchpad:input:b0003v046Dp4011*
 LIBINPUT_ATTR_PALM_PRESSURE_THRESHOLD=500

I did a full system reboot afterwards. Both "udevadm test" and "libinput
measure touchpad-pressure" now report the palm threshold to be 500.

However, the mouse cursor still gets stuck, just like before.

"libinput measure touchpad-threshold" used to print "palm" at the end of the
line when the cursor would get stuck. Now that the palm threshold is higher it
no longer prints "palm" ... but the cursor still gets stuck just like before.

Bummer.

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[Wayland-bugs] [Bug 105753] Logitech wireless touchpad hesitates or stops on Ubuntu

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=105753

--- Comment #19 from stacktracer  ---
Indeed:

$ libinput debug-events --device /dev/input/event14 --verbose
event14 - Logitech Wireless Touchpad: is tagged by udev as: Touchpad
event14 - using pressure-based touch detection (5:6)
event14 - palm: pressure threshold is 130
event14 - Logitech Wireless Touchpad: device is a touchpad


... Not sure where to go next. I'll try the udevadm update steps again, but I'm
not optimistic. Suggestions appreciated.

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