I'm using this touchscreen on a raspi zero w and I'm currently working on a python application.
I was working with the python serial module since some time and everything was working fine, but since some days when I try to work with the serial module, the touchscreen functionality vanishes, first 30 seconds it ignores like 70% of touches and after that it just stops working.
Here is a interesting part of the dmesg output, but I couldn't find out if there is any useful information:
[ 15.057964] ads7846 spi0.1: touchscreen, irq 177 [ 15.073211] input: ADS7846 Touchscreen as /devices/platform/soc/20204000.spi/spi_master/spi0/spi0.1/input/input0 [ 15.111258] fbtft: module is from the staging directory, the quality is unknown, you have been warned. [ 15.161098] fb_ili9340: module is from the staging directory, the quality is unknown, you have been warned. [ 15.162101] pinctrl-bcm2835 20200000.gpio: pin gpio17 already requested by spi0.1; cannot claim for spi0.0 [ 15.162132] pinctrl-bcm2835 20200000.gpio: pin-17 (spi0.0) status -22 [ 15.162151] pinctrl-bcm2835 20200000.gpio: could not request pin 17 (gpio17) from group gpio17 on device pinctrl-bcm2835 [ 15.162163] fb_ili9340 spi0.0: Error applying setting, reverse things back [ 15.162246] fbtft_of_value: buswidth = 8 [ 15.162264] fbtft_of_value: debug = 0 [ 15.162274] fbtft_of_value: rotate = 180 [ 15.162285] fbtft_of_value: fps = 25 [ 16.259374] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code