On 09.11.24 15:54, Ulrich Müller wrote: >>>>>> On Sat, 09 Nov 2024, Linux regression tracking (Thorsten Leemhuis) wrote: > >> On 03.11.24 09:24, Ulrich Müller wrote: >>> After upgrading from 6.6.52 to 6.6.58, tapping on the touchpad stopped >>> working. The problem is still present in 6.6.59. >>> >>> I see the following in dmesg output; the first line was not there >>> previously: >>> >>> [ 2.129282] hid-multitouch 0018:27C6:01E0.0001: The byte is not expected for fixing the report descriptor. It's possible that the touchpad firmware is not suitable for applying the fix. got: 9 >>> [ 2.137479] input: GXTP5140:00 27C6:01E0 as /devices/platform/AMDI0010:00/i2c-0/i2c-GXTP5140:00/0018:27C6:01E0.0001/input/input10 >>> [ 2.137680] input: GXTP5140:00 27C6:01E0 as /devices/platform/AMDI0010:00/i2c-0/i2c-GXTP5140:00/0018:27C6:01E0.0001/input/input11 >>> [ 2.137921] hid-multitouch 0018:27C6:01E0.0001: input,hidraw0: I2C HID v1.00 Mouse [GXTP5140:00 27C6:01E0] on i2c-GXTP5140:00 >>> >>> Hardware is a Lenovo ThinkPad L15 Gen 4. >>> >>> The problem goes away when reverting this commit: >>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/hid/hid-multitouch.c?id=251efae73bd46b097deec4f9986d926813aed744 > >> Thx for the report. Is this a 6.6.y specific thing, or does it happen >> with 6.12-rc6 or later as well? And if it does: does the revert fix it >> there, too? > > It still happens with 6.12-rc6, and the revert fixes it. He Lugang, in case you missed it: the culprit (251efae73bd46b ("HID: multitouch: Add support for lenovo Y9000P Touchpad") [v6.12-rc1]) is a commit of yours. At it was already backported to various stable series, so it would be good to fix this rather sooner than later. Ciao, Thorsten
