Hello again,
Please ignore the report quoted below. Everything is working as
expected on linux 6.3.2.
On Sat, Apr 29, 2023 at 5:01 PM Alexander E. Patrakov
<patrakov@xxxxxxxxx> wrote:
>
> Hello,
>
> A few days ago, I bought a new laptop, Dell Inspiron 7415 2-in-1. It
> has a touchscreen that works out of the box - until you buy a stylus
> recommended by Dell. The stylus is "Dell Active Pen PN350M", which
> uses Microsoft Pen Protocol.
>
> The problem is that, when I lift the pen off the screen, the touch
> point remains active, but jumps into one of the corners. This
> persists, and makes doing anything in the GUI impossible, until the
> laptop is powered off.
>
> I have looked into hid-multitouch.c, and found that there is a quirk
> that might be relevant: MT_QUIRK_VALID_IS_INRANGE. Unfortunately, it
> does not really help, see below.
>
> The default quirks for this touchscreen are 0x51c10, which means
> MT_QUIRK_ALWAYS_VALID | MT_QUIRK_IGNORE_DUPLICATES | MT_QUIRK_HOVERING
> | MT_QUIRK_CONTACT_CNT_ACCURATE | MT_QUIRK_STICKY_FINGERS |
> MT_QUIRK_WIN8_PTP_BUTTONS. So I guessed I should remove
> MT_QUIRK_ALWAYS_VALID and add MT_QUIRK_VALID_IS_INRANGE, which results
> in 0x51c20.
>
> So:
>
> echo 0x51c20 > /sys/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/quirks
>
> Result: the touchscreen now tracks the stylus correctly, but does not
> react to fingers anymore.
>
> I am willing to try kernel patches, but have too much other work to
> try writing myself a new quirk that applies the "in range means valid"
> logic for stylus only.
>
> If you need any other debug info, please tell me.
>
> The /proc/bus/input/devices file contains:
> ============================
> I: Bus=0019 Vendor=0000 Product=0001 Version=0000
> N: Name="Power Button"
> P: Phys=PNP0C0C/button/input0
> S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
> U: Uniq=
> H: Handlers=kbd event0
> B: PROP=0
> B: EV=3
> B: KEY=10000000000000 0
>
> I: Bus=0019 Vendor=0000 Product=0005 Version=0000
> N: Name="Lid Switch"
> P: Phys=PNP0C0D/button/input0
> S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
> U: Uniq=
> H: Handlers=event1
> B: PROP=0
> B: EV=21
> B: SW=1
>
> I: Bus=0019 Vendor=0000 Product=0003 Version=0000
> N: Name="Sleep Button"
> P: Phys=PNP0C0E/button/input0
> S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input2
> U: Uniq=
> H: Handlers=kbd event2
> B: PROP=0
> B: EV=3
> B: KEY=4000 0 0
>
> I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
> N: Name="AT Translated Set 2 keyboard"
> P: Phys=isa0060/serio0/input0
> S: Sysfs=/devices/platform/i8042/serio0/input/input3
> U: Uniq=
> H: Handlers=sysrq kbd leds event3
> B: PROP=0
> B: EV=120013
> B: KEY=1100f02902000 8380307cf910f001 feffffdfffefffff fffffffffffffffe
> B: MSC=10
> B: LED=7
>
> I: Bus=0019 Vendor=0000 Product=0006 Version=0000
> N: Name="Video Bus"
> P: Phys=LNXVIDEO/video/input0
> S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:10/LNXVIDEO:00/input/input5
> U: Uniq=
> H: Handlers=kbd event4
> B: PROP=0
> B: EV=3
> B: KEY=3e000b00000000 0 0 0
>
> I: Bus=0019 Vendor=0000 Product=0000 Version=0000
> N: Name="DELL Wireless hotkeys"
> P: Phys=dellabce/input0
> S: Sysfs=/devices/virtual/input/input6
> U: Uniq=
> H: Handlers=kbd event5 rfkill
> B: PROP=0
> B: EV=3
> B: KEY=80000000000000 0 0 0
>
> I: Bus=0010 Vendor=001f Product=0001 Version=0100
> N: Name="PC Speaker"
> P: Phys=isa0061/input0
> S: Sysfs=/devices/platform/pcspkr/input/input7
> U: Uniq=
> H: Handlers=kbd event6
> B: PROP=0
> B: EV=40001
> B: SND=6
>
> I: Bus=0019 Vendor=0000 Product=0000 Version=0000
> N: Name="Dell WMI hotkeys"
> P: Phys=
> S: Sysfs=/devices/platform/PNP0C14:00/wmi_bus/wmi_bus-PNP0C14:00/9DBB5994-A997-11DA-B012-B622A1EF5492/input/input18
> U: Uniq=
> H: Handlers=kbd event7 rfkill
> B: PROP=0
> B: EV=13
> B: KEY=800000000000 0 0 101500b00000c00 1200300000 e000000000000 0
> B: MSC=10
>
> I: Bus=0003 Vendor=0c45 Product=6a10 Version=0271
> N: Name="Integrated_Webcam_HD: Integrate"
> P: Phys=usb-0000:03:00.4-1/button
> S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.4/usb3/3-1/3-1:1.0/input/input19
> U: Uniq=
> H: Handlers=kbd event8
> B: PROP=0
> B: EV=3
> B: KEY=100000 0 0 0
>
> I: Bus=0000 Vendor=0000 Product=0000 Version=0000
> N: Name="HD-Audio Generic HDMI/DP,pcm=3"
> P: Phys=ALSA
> S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.1/sound/card0/input20
> U: Uniq=
> H: Handlers=event9
> B: PROP=0
> B: EV=21
> B: SW=140
>
> I: Bus=0018 Vendor=06cb Product=ce26 Version=0100
> N: Name="DELL0A8C:00 06CB:CE26 Mouse"
> P: Phys=i2c-DELL0A8C:00
> S: Sysfs=/devices/platform/AMDI0010:03/i2c-1/i2c-DELL0A8C:00/0018:06CB:CE26.0005/input/input22
> U: Uniq=
> H: Handlers=event11 mouse0
> B: PROP=0
> B: EV=17
> B: KEY=30000 0 0 0 0
> B: REL=3
> B: MSC=10
>
> I: Bus=0000 Vendor=0000 Product=0000 Version=0000
> N: Name="HD-Audio Generic HDMI/DP,pcm=7"
> P: Phys=ALSA
> S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.1/sound/card0/input21
> U: Uniq=
> H: Handlers=event10
> B: PROP=0
> B: EV=21
> B: SW=140
>
> I: Bus=0018 Vendor=06cb Product=ce26 Version=0100
> N: Name="DELL0A8C:00 06CB:CE26 Touchpad"
> P: Phys=i2c-DELL0A8C:00
> S: Sysfs=/devices/platform/AMDI0010:03/i2c-1/i2c-DELL0A8C:00/0018:06CB:CE26.0005/input/input23
> U: Uniq=
> H: Handlers=event12 mouse1
> B: PROP=5
> B: EV=1b
> B: KEY=e520 10000 0 0 0 0
> B: ABS=2e0800000000003
> B: MSC=20
>
> I: Bus=0018 Vendor=04f3 Product=2c68 Version=0100
> N: Name="04F31234:00 04F3:2C68"
> P: Phys=i2c-04F31234:00
> S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/input/input25
> U: Uniq=
> H: Handlers=event13 mouse2
> B: PROP=2
> B: EV=1b
> B: KEY=400 0 0 0 0 0
> B: ABS=3273800000000003
> B: MSC=20
>
> I: Bus=0018 Vendor=04f3 Product=2c68 Version=0100
> N: Name="04F31234:00 04F3:2C68 UNKNOWN"
> P: Phys=i2c-04F31234:00
> S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/input/input26
> U: Uniq=
> H: Handlers=event14
> B: PROP=0
> B: EV=9
> B: ABS=10000000000
>
> I: Bus=0018 Vendor=04f3 Product=2c68 Version=0100
> N: Name="04F31234:00 04F3:2C68 UNKNOWN"
> P: Phys=i2c-04F31234:00
> S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/input/input27
> U: Uniq=
> H: Handlers=event15
> B: PROP=0
> B: EV=100001
>
> I: Bus=0018 Vendor=04f3 Product=2c68 Version=0100
> N: Name="04F31234:00 04F3:2C68 Stylus"
> P: Phys=i2c-04F31234:00
> S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/input/input28
> U: Uniq=
> H: Handlers=event16 mouse3
> B: PROP=2
> B: EV=1b
> B: KEY=c03 0 0 0 0 0
> B: ABS=1000d000003
> B: MSC=10
>
> I: Bus=0000 Vendor=0000 Product=0000 Version=0000
> N: Name="HD-Audio Generic Headphone Mic"
> P: Phys=ALSA
> S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card1/input31
> U: Uniq=
> H: Handlers=event17
> B: PROP=0
> B: EV=21
> B: SW=4
> ============================
>
> Here is some udevadm info, just in case, too:
>
> ============================
>
> Udevadm info starts with the device specified by the devpath and then
> walks up the chain of parent devices. It prints for every device
> found, all possible attributes in the udev rules key format.
> A rule to match, can be composed by the attributes of the device
> and the attributes from one single parent device.
>
> looking at device
> '/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004/input/input28':
> KERNEL=="input28"
> SUBSYSTEM=="input"
> DRIVER==""
> ATTR{capabilities/abs}=="1000d000003"
> ATTR{capabilities/ev}=="1b"
> ATTR{capabilities/ff}=="0"
> ATTR{capabilities/key}=="c03 0 0 0 0 0"
> ATTR{capabilities/led}=="0"
> ATTR{capabilities/msc}=="10"
> ATTR{capabilities/rel}=="0"
> ATTR{capabilities/snd}=="0"
> ATTR{capabilities/sw}=="0"
> ATTR{id/bustype}=="0018"
> ATTR{id/product}=="2c68"
> ATTR{id/vendor}=="04f3"
> ATTR{id/version}=="0100"
> ATTR{inhibited}=="0"
> ATTR{name}=="04F31234:00 04F3:2C68 Stylus"
> ATTR{phys}=="i2c-04F31234:00"
> ATTR{power/control}=="auto"
> ATTR{power/runtime_active_time}=="0"
> ATTR{power/runtime_status}=="unsupported"
> ATTR{power/runtime_suspended_time}=="0"
> ATTR{properties}=="2"
> ATTR{uniq}==""
>
> looking at parent device
> '/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00/0018:04F3:2C68.0004':
> KERNELS=="0018:04F3:2C68.0004"
> SUBSYSTEMS=="hid"
> DRIVERS=="hid-multitouch"
> ATTRS{country}=="00"
> ATTRS{power/control}=="auto"
> ATTRS{power/runtime_active_time}=="0"
> ATTRS{power/runtime_status}=="unsupported"
> ATTRS{power/runtime_suspended_time}=="0"
> ATTRS{quirks}=="334880"
>
> looking at parent device
> '/devices/platform/AMDI0010:00/i2c-0/i2c-04F31234:00':
> KERNELS=="i2c-04F31234:00"
> SUBSYSTEMS=="i2c"
> DRIVERS=="i2c_hid_acpi"
> ATTRS{name}=="04F31234:00"
> ATTRS{power/control}=="auto"
> ATTRS{power/runtime_active_time}=="0"
> ATTRS{power/runtime_status}=="unsupported"
> ATTRS{power/runtime_suspended_time}=="0"
>
> looking at parent device '/devices/platform/AMDI0010:00/i2c-0':
> KERNELS=="i2c-0"
> SUBSYSTEMS=="i2c"
> DRIVERS==""
> ATTRS{delete_device}=="(not readable)"
> ATTRS{name}=="Synopsys DesignWare I2C adapter"
> ATTRS{new_device}=="(not readable)"
> ATTRS{waiting_for_supplier}=="0"
>
> looking at parent device '/devices/platform/AMDI0010:00':
> KERNELS=="AMDI0010:00"
> SUBSYSTEMS=="platform"
> DRIVERS=="i2c_designware"
> ATTRS{driver_override}=="(null)"
> ATTRS{power/autosuspend_delay_ms}=="1000"
> ATTRS{power/control}=="auto"
> ATTRS{power/runtime_active_time}=="1809937"
> ATTRS{power/runtime_status}=="active"
> ATTRS{power/runtime_suspended_time}=="74571"
>
> looking at parent device '/devices/platform':
> KERNELS=="platform"
> SUBSYSTEMS==""
> DRIVERS==""
> ATTRS{power/control}=="auto"
> ATTRS{power/runtime_active_time}=="0"
> ATTRS{power/runtime_status}=="unsupported"
> ATTRS{power/runtime_suspended_time}=="0"
>
> ============================
--
Alexander E. Patrakov
