Re: Linux 6.1 and 6.2-rc make mousewheel on Logitech G903 (046d:c091) report too many non-hires events

["Linux kernel regression tracking (Thorsten Leemhuis)" <regressions@leemhuis.info>]

On 28.01.23 16:39, Salvatore Bonaccorso wrote:
> On Wed, Jan 25, 2023 at 11:01:00PM +0100, Tobias Klausmann wrote:
>> Hi!
>>
>> As it says in the subject.
>>
>> At some point between 6.0 and 6.1, the kernel (if HID_LOGITECH_HIDPP was
>> m or y) started reporting a full event for every hires event on a
>> Logitech G903. 
>>
>> In my quest of finding out what the root cause is, ive filed these bugs:
>>
>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1029584
>> https://gitlab.freedesktop.org/libinput/libinput/-/issues/852
>>
>> The libinput one has the most detail. The most relevant one is this log
>> from libinput record, showing what happens if I turn the mousewheel by
>> one notch:
>>
>>     events:
>>     # Current time is 20:37:11
>>     - evdev:
>>       - [  3,  63476,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3,  63476,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3,  63476,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +3063ms
>>     - evdev:
>>       - [  3, 139476,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 139476,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 139476,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +76ms
>>     - evdev:
>>       - [  3, 197482,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 197482,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 197482,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +58ms
>>     - evdev:
>>       - [  3, 227485,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 227485,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 227485,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +30ms
>>     - evdev:
>>       - [  3, 240484,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 240484,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 240484,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +13ms
>>     - evdev:
>>       - [  3, 250470,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 250470,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 250470,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +10ms
>>     - evdev:
>>       - [  3, 256486,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 256486,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 256486,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +6ms
>>     - evdev:
>>       - [  3, 264472,   2,   8,      -1] # EV_REL / REL_WHEEL                -1
>>       - [  3, 264472,   2,  11,    -120] # EV_REL / REL_WHEEL_HI_RES       -120
>>       - [  3, 264472,   0,   0,       0] # ------------ SYN_REPORT (0) ---------- +8ms
>>     # Current time is 20:37:15
>>
>> Note how it reports both REL_WHEEL and REL_WHEEL_HI_RES at every
>> instance.
>>
>> I've tried assorted kernels, both Debian as well as hand-compiled
>> vanilla ones, and the problem only shows up if hid_logitech_hidpp.ko is
>> loaded, so I am blacklisting it for now. Also note that even unloading
>> the module didn't fix the behavior, though that may be because X11 was
>> still runing and so libinput's state ight have been still mangled.
>>
>> The most recent kernels I have tested with are 6.1.4 and 6.2-rc5.
>>
>> Best,
>> Tobias
> 
> Let's loop in as well the regresssions list.

Thx for that.

TWIMC, I assume it's the same issue as this one:
https://bugzilla.kernel.org/show_bug.cgi?id=216885

There in the past few days was some discussion about the issue with the
author of the culprit there.

HTH, ciao, Thorsten (wearing his 'the Linux kernel's regression tracker'
hat)
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