New revision of 0c45:8419 Microdia/Wivitouch USB Infrared Touchscreen no longer working under 14.04
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
evtest (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Filing here per request at:
http://
The issue is regarding infra-red overlay touch screen panels from Wivitouch in China:
http://
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I have approximately 300 USB touch panels, from two different batches, but all report the same USB ID 0c45:8419. The manufacturer told me they had changed the firmware without changing the USB ID/version because they did not consider the change important. Both batches work correctly on Ubuntu 10.04, but only the first batch works on Ubuntu 14.04. The remaining batch does not work under Ubuntu 14.04 so this is a regression.
After plugging in, both batches appear equivalently under:
/dev/
and for both 'evtest' reports:
Input device ID: bus 0x3 vendor 0xc45 product 0x8419 version 0x100
Input device name: "SONiX USB Device"
…
Presumably something is occuring that causes a version version of 'libev' to handle one batch differently. Attached is the output of running:
$ sudo lsusb -vvvv -c -d 0c45:8419 > ….txt
for one device from each of the two batches, which confirms that they appear identically. I have tested 250/250 (working) from the first batch, and 10/50 (not-working) from the second batch.
The only way to tell the batches apart is by the length of the USB cable, the first (working) batch have USB cables that are 15-20 centimetres long, and the second (non-working) batch have USB cables that are ~1 metre long.
description: | updated |
Changed in evtest (Ubuntu): | |
status: | Confirmed → Incomplete |
description: | updated |
summary: |
- New revision of 0c45:8419 Microdia USB Touchscreen not working under - 14.04 + New revision of 0c45:8419 Microdia/Wivitouch USB Infrared Touchscreen no + longer working under 14.04 |
description: | updated |
description: | updated |
description: | updated |
Changed in evtest (Ubuntu): | |
status: | Incomplete → Confirmed |
This works on ubuntu 10.04 the new batch and the old batch, out of the box.