<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Palm detection: ignore moves over a pressure threshold" href="https://bugs.freedesktop.org/show_bug.cgi?id=94236#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - Palm detection: ignore moves over a pressure threshold" href="https://bugs.freedesktop.org/show_bug.cgi?id=94236">bug 94236</a> from <a class="email" href="mailto:lagoon42@gmail.com" title="Cyril B. <lagoon42@gmail.com>"> Cyril B.</a> <pre>Sorry for the delay, for some reason I hadn't received your response notification by email. My touchpad is a Dell XPS 13 9350 (which is identical to earlier version of the Dell XPS, according to Benjamin). Here is the evemu-describe (in I2C mode, so the mode when pressure is not reported...): # EVEMU 1.3 # Kernel: 4.5.0-rc5-mainline # DMI: dmi:bvnDellInc.:bvr1.2.3:bd01/08/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr: # Input device name: "DLL0704:01 06CB:76AD Touchpad" # Input device ID: bus 0x18 vendor 0x6cb product 0x76ad version 0x100 # Supported events: # Event type 0 (EV_SYN) # Event code 0 (SYN_REPORT) # Event code 1 (SYN_CONFIG) # Event code 2 (SYN_MT_REPORT) # Event code 3 (SYN_DROPPED) # Event code 4 ((null)) # Event code 5 ((null)) # Event code 6 ((null)) # Event code 7 ((null)) # Event code 8 ((null)) # Event code 9 ((null)) # Event code 10 ((null)) # Event code 11 ((null)) # Event code 12 ((null)) # Event code 13 ((null)) # Event code 14 ((null)) # Event type 1 (EV_KEY) # Event code 272 (BTN_LEFT) # Event code 325 (BTN_TOOL_FINGER) # Event code 330 (BTN_TOUCH) # Event code 333 (BTN_TOOL_DOUBLETAP) # Event code 334 (BTN_TOOL_TRIPLETAP) # Event type 3 (EV_ABS) # Event code 0 (ABS_X) # Value 609 # Min 0 # Max 1216 # Fuzz 0 # Flat 0 # Resolution 12 # Event code 1 (ABS_Y) # Value 300 # Min 0 # Max 680 # Fuzz 0 # Flat 0 # Resolution 12 # Event code 47 (ABS_MT_SLOT) # Value 0 # Min 0 # Max 2 # Fuzz 0 # Flat 0 # Resolution 0 # Event code 53 (ABS_MT_POSITION_X) # Value 0 # Min 0 # Max 1216 # Fuzz 0 # Flat 0 # Resolution 12 # Event code 54 (ABS_MT_POSITION_Y) # Value 0 # Min 0 # Max 680 # Fuzz 0 # Flat 0 # Resolution 12 # Event code 57 (ABS_MT_TRACKING_ID) # Value 0 # Min 0 # Max 65535 # Fuzz 0 # Flat 0 # Resolution 0 # Properties: # Property type 0 (INPUT_PROP_POINTER) # Property type 2 (INPUT_PROP_BUTTONPAD) N: DLL0704:01 06CB:76AD Touchpad I: 0018 06cb 76ad 0100 P: 05 00 00 00 00 00 00 00 B: 00 0b 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 01 00 00 00 00 00 B: 01 20 64 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 01 00 00 00 00 00 00 00 00 B: 02 00 00 00 00 00 00 00 00 B: 03 03 00 00 00 00 80 60 02 B: 04 00 00 00 00 00 00 00 00 B: 05 00 00 00 00 00 00 00 00 B: 11 00 00 00 00 00 00 00 00 B: 12 00 00 00 00 00 00 00 00 B: 14 00 00 00 00 00 00 00 00 B: 15 00 00 00 00 00 00 00 00 B: 15 00 00 00 00 00 00 00 00 A: 00 0 1216 0 0 12 A: 01 0 680 0 0 12 A: 2f 0 2 0 0 0 A: 35 0 1216 0 0 12 A: 36 0 680 0 0 12 A: 39 0 65535 0 0 0 If I try hard enough, I can have a light palm be detected as a finger, so the pressure detection obviously won't help. Howver in my case, in real conditions, when my palm rests on the touchpad, it's definitely not a light palm. Is there a drawback to discard touches with a very high pressure? Those are definitely not fingers. Let me add that a change introduced in Linux 4.5 enables the touchpad own palm detection (which has its own problems, unfortunately) when it's in I2C mode.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>