Added touchscreen-issues

knowledgebase/troubleshooting/touchscreen-issues.md

@@ -0,0 +1,40 @@
+## Troubleshooting TouchScreen Driver Loading
+
+After a succesfully install of Bliss OS I noticed that my touchscreen didn't work. While inspecting the `dmesg` logs, I discovered that the system was attempting to load the incorrect driver, indicated by the following error:
+```
+silead_ts i2c-MSSL0017:00: Direct firmware load for silead/mssl0017.fw failed with error -2
+```
+
+This problem can be resolved by following a procedure similar to the one detailed in [this GitHub issue](https://github.com/danielotero/linux-on-hi10/issues/20) but applied specifically to BlissOS.
+
+### Instrunctions
+
+1. **Mount the System as Read-Write:**
+   You must first remount your system as read-write. Instructions can be found on the [BlissOS documentation site](https://docs.blissos.org/knowledgebase/troubleshooting/remount-system-as-read-write/).
+
+   In my case, I already had `system.img` so I simply followed the instructions starting from the command `reboot -f`.
+
+2. **Replace the Firmware File:**
+   Once you can modify the system partition, rename the firmware file:
+   ```
+   mv /vendor/firmware/silead/gsl1680-chuwi-hi10plus.fw /vendor/firmware/silead/mssl0017.fw
+   ```
+
+3. **Reload the Silead Module:**
+   ```
+   rmmod silead
+   modprobe silead
+   ```
+
+4. **Calibration Tool:**
+   Now try to run built-in calibration tool, if it is still failing do the following:
+   ```
+   su
+   mkdir -p /data/misc/tscal
+   touch /data/misc/tscal/pointercal
+   chown 1000:1000 /data/misc/tscal /data/misc/tscal/*
+   chmod 775 /data/misc/tscal
+   chmod 664 /data/misc/tscal/pointercal
+   reboot
+   ```
+   After rebooting, try running the built-in calibration tool again.