Amir/Michael, are you aware of any low-level change?

adlr@, any idea what changed? I vaguely remember hearing that CrOS may start treating on-screen vs off-screen stylus differently. Any chance this change has taken place already?

- Just confirmed that evtest is showing stylus tilt info from Wacom Intuos Pro. Not sure where it is getting lost. Tested again on Chrome ToT on CrOS (52.0.2723.0), the regression is still there.

- Forgot to mention before: need to enable PointerEvents though about:flags for the repro.

Is this an issue in pointer events?

The outcome we are seeing is through PointerEvents but the regression could be anywhere in the pipeline after device driver (evtest still works).

Nothing changed in event property plumbing in Blink I believe. Don't know what caused it: chromium or some CrOS specific code.

Does anyone own the input code in Chrome for Chrome OS/linux?

Michael, any chance you know the answer to #6?

No full time owner, no, but the code is in maintenance mode so such a person would probably get bored.

I'm not aware of nay changes that could cause this. Mustaq, since nobody has a guess as to the cause, could you bisect to find the culprit CL?

Looking into it.

Ooops, looks like a crack in Blink code, in PointerEventFactory to be precise!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/abca6ff6e9ffb9791242701d4499e0144ed94283

commit abca6ff6e9ffb9791242701d4499e0144ed94283
Author: mustaq <mustaq@chromium.org>
Date: Thu Jun 09 17:29:53 2016

Added missing pen tilt when creating PointerEvent from ME.

Added back the missing plumbing. Also added EventSender support to pass stylus
info for testing.

BUG= 593850 

Review-Url: https://codereview.chromium.org/2043053002
Cr-Commit-Position: refs/heads/master@{#398933}

[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/components/test_runner/event_sender.cc
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/components/test_runner/event_sender.h
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties.html
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/Source/core/events/PointerEventFactory.cpp

Your change meets the bar and is auto-approved for M52 (branch: 2743)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/81cc368082725d36a267ffbe37f2eb96e7585551

commit 81cc368082725d36a267ffbe37f2eb96e7585551
Author: Mustaq Ahmed <mustaq@google.com>
Date: Fri Jun 10 16:58:11 2016

Added missing pen tilt when creating PointerEvent from ME.

Added back the missing plumbing. Also added EventSender support to pass stylus
info for testing.

BUG= 593850 

Review-Url: https://codereview.chromium.org/2043053002
Cr-Commit-Position: refs/heads/master@{#398933}
(cherry picked from commit abca6ff6e9ffb9791242701d4499e0144ed94283)

Review URL: https://codereview.chromium.org/2054123002 .

Cr-Commit-Position: refs/branch-heads/2743@{#316}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/components/test_runner/event_sender.cc
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/components/test_runner/event_sender.h
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties.html
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/Source/core/events/PointerEventFactory.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/abca6ff6e9ffb9791242701d4499e0144ed94283

commit abca6ff6e9ffb9791242701d4499e0144ed94283
Author: mustaq <mustaq@chromium.org>
Date: Thu Jun 09 17:29:53 2016

Added missing pen tilt when creating PointerEvent from ME.

Added back the missing plumbing. Also added EventSender support to pass stylus
info for testing.

BUG= 593850 

Review-Url: https://codereview.chromium.org/2043053002
Cr-Commit-Position: refs/heads/master@{#398933}

[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/components/test_runner/event_sender.cc
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/components/test_runner/event_sender.h
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties.html
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/abca6ff6e9ffb9791242701d4499e0144ed94283/third_party/WebKit/Source/core/events/PointerEventFactory.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/81cc368082725d36a267ffbe37f2eb96e7585551

commit 81cc368082725d36a267ffbe37f2eb96e7585551
Author: Mustaq Ahmed <mustaq@google.com>
Date: Fri Jun 10 16:58:11 2016

Added missing pen tilt when creating PointerEvent from ME.

Added back the missing plumbing. Also added EventSender support to pass stylus
info for testing.

BUG= 593850 

Review-Url: https://codereview.chromium.org/2043053002
Cr-Commit-Position: refs/heads/master@{#398933}
(cherry picked from commit abca6ff6e9ffb9791242701d4499e0144ed94283)

Review URL: https://codereview.chromium.org/2054123002 .

Cr-Commit-Position: refs/branch-heads/2743@{#316}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/components/test_runner/event_sender.cc
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/components/test_runner/event_sender.h
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/fast/events/pointerevents/mouse-pointer-event-properties.html
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/LayoutTests/virtual/pointerevent/fast/events/pointerevents/mouse-pointer-event-properties-expected.txt
[modify] https://crrev.com/81cc368082725d36a267ffbe37f2eb96e7585551/third_party/WebKit/Source/core/events/PointerEventFactory.cpp

 Issue 624815  has been merged into this issue.