Hi Dmitry,

On Thu, Dec 12, 2019 at 06:34:46PM +0300, Dmitry Mastykin wrote:

Здравствуйте, Дмитрий.
Простите, что отвлекаю, если что - не отвечайте и в лучшем случае
пошлите в mail-list)
У меня есть планшет с x86, вариантом Debian с ядром 4.15 и
контроллером тач-скрина gt928.

What is the model of the tablet?

После suspend/resume не всегда, но очень часто тачскрин перестает
работать и постоянно выводит:
[ 3276.729412] Goodix-TS i2c-GDIX1002:00: I2C write end_cmd error
[ 3276.770153] Goodix-TS i2c-GDIX1002:00: I2C transfer error: -121

When this happens, are these messages appear constantly, or only in
response to actual touch? Can you still interact with the device?

Could you please send the full dmesg so we know more about the device.

Hans, Bastien, have you seen such issues with Goodix occasionally
misbehaving on resume?

По i2cget/i2cset контроллер успешно отвечает.

The fact that you can talk to the controller like that is interesting.
Just to confirm, does it return sane data, or garbage?

Thanks.

-- 
Dmitry