Public bug reported: The hid-sony driver has custom DS4 connect/disconnect logic for the DS4 dongle, which is a USB dongle acting as a proxy to Bluetooth connected DS4.
The connect/disconnect logic works fine generally, however not in conjunction with Steam. Steam implements its own DS4 driver using hidraw. Both hid-sony and Steam are issuing their own HID requests and are racing each other during DS4 dongle connect/disconnect resulting in a kernel crash in hid-sony. The problem is that upon a DS4 connect to the dongle, hid-sony kicks of 'ds4_get_calibration_data' from within its dongle hotplug code. The calibration code issues raw HID feature report for reportID 0x02. When Steam is running, it issues a feature report for reportID 0x12 typically just prior to hid-sony requesting feature reportID 0x02. The result is that 'ds4_get_calibration_data' receives the data Steam requested as that's the HID report returing first. Currently this results in it processing invalid data, which ultimately results in a divide by zero upon a future 'dualshock4_parse_report'. The solution for now is to check within 'ds4_get_calibration_data' to check if we received data for the feature report we issued and if not retry. Please consider to add this patch to Ubuntu LTS kernels. Commit: https://github.com/torvalds/linux/commit/f5dc93b7875bcb8be77baa792cc9432aaf65365b ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1935846 Title: Sony Dualshock 4 usb dongle crashes the whole system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1935846/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
