But there's also this bit on line 1158:
if (SYN_CAP_PALMDETECT(priv->capabilities))
input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
And my touchpad does report that it has the palm detection capability.
It looks like I should be seeing widths reported then.
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https://bugs.launchpad.net/bugs/1245328
Title:
Synaptics kernel driver does not report finger width information,
breaking usermode driver's palm detection
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
While doing some work on the Xorg synaptics driver, I noticed that we
never actually detect palm blocking even after running synclient
PalmDetect=1. Digging in a bit, the driver claims in its capability
bits that it should be sending ABS_TOOL_WIDTH records, but according
to evtest(1), the driver never sends these advertised records to
userspace. As a result, the Xorg synaptics driver never sees
hw->fingerWidth become non-zero in SynapticsDetectFinger and never
detects that I've mashed my palm into the large touchpad on this
machine.
Expected:
Kill X. Run evtest(1). Select touchpad device. Move touchpad. See
ABS_TOOL_WIDTH records in the event stream.
Actual:
No ABS_TOOL_WIDTH records even though the device claims to support
them in its capability bits.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-12-generic 3.11.0-12.19 [modified:
boot/vmlinuz-3.11.0-12-generic]
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dancol 2258 F.... pulseaudio
Date: Sun Oct 27 21:43:01 2013
HibernationDevice: RESUME=UUID=7da7377a-42c7-49f8-a060-8dee466c61fd
InstallationDate: Installed on 2013-10-23 (4 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: LENOVO 34601F5
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-12-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.11.0-12-generic N/A
linux-backports-modules-3.11.0-12-generic N/A
linux-firmware 1.116
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/29/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G6ET96WW (2.56 )
dmi.board.asset.tag: Not Available
dmi.board.name: 34601F5
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: 2059198
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG6ET96WW(2.56):bd04/29/2013:svnLENOVO:pn34601F5:pvrThinkPadX1Carbon:rvnLENOVO:rn34601F5:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 34601F5
dmi.product.version: ThinkPad X1 Carbon
dmi.sys.vendor: LENOVO
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