Public bug reported:
Link: https://patchwork.kernel.org/patch/10141099/
Link: https://patchwork.kernel.org/patch/10141097/
[Impact]
Resume of S3 cause system hang on Lenovo laptops with RayD touchscreen.
[Fix]
RayD touchscreen issued corrupted data after it resume from suspend,
then HID driver didn't handle the data well because of the data overflow
and made a call trace and hang.
Keep memset safe from corrupted data and add command to make RayD
touchscreen back to normal.
Then touchscreen works fine.
[Test Case]
Tested on ThinkPad L380, works fine with fixes.
[Regression Potential]
Low, keep the data in hid-core and i2c-hid more strictly.
Add specific device quirk in i2c-hid.
** Affects: hwe-next
Importance: Critical
Assignee: AaronMa (mapengyu)
Status: New
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: AaronMa (mapengyu)
Status: Incomplete
** Tags: originate-from-1731135 sutton
** Changed in: linux (Ubuntu)
Importance: Undecided => Critical
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => AaronMa (mapengyu)
** Tags added: originate-from-1731135 sutton
** Changed in: hwe-next
Importance: Undecided => Critical
** Changed in: hwe-next
Assignee: (unassigned) => AaronMa (mapengyu)
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https://bugs.launchpad.net/bugs/1741168
Title:
HID: Fix RayD touchscreen failure to resume from suspend
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
Link: https://patchwork.kernel.org/patch/10141099/
Link: https://patchwork.kernel.org/patch/10141097/
[Impact]
Resume of S3 cause system hang on Lenovo laptops with RayD touchscreen.
[Fix]
RayD touchscreen issued corrupted data after it resume from suspend,
then HID driver didn't handle the data well because of the data overflow
and made a call trace and hang.
Keep memset safe from corrupted data and add command to make RayD
touchscreen back to normal.
Then touchscreen works fine.
[Test Case]
Tested on ThinkPad L380, works fine with fixes.
[Regression Potential]
Low, keep the data in hid-core and i2c-hid more strictly.
Add specific device quirk in i2c-hid.
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