Arch Linux

icar

Member

From: Catalunya

Registered: 2020-07-31

Posts: 535

2.4GHz TV Remote

Hi,
I'm trying to make a remote I bought from China to work.

Context: I have an old iMac with LibreELEC that I want to control with it. The computer has some quirks and sometimes works, sometimes it doesn't. After a week of the installation of the remote, it stopped working. The device itself emits a light when signal is being transmitted, so, apparently, it's not the remote's fault. Curiously, I plugged it in my ArchLinux laptop and...

Problem: Connecting the USB receiver and clicking any buttons does nothing, but the device is recognised by linux; extract from the systemd journal:

d’oct. 17 21:02:15 asus-arch-icar kernel: usb 1-4: new low-speed USB device number 6 using xhci_hcd
d’oct. 17 21:02:15 asus-arch-icar kernel: usb 1-4: New USB device found, idVendor=276d, idProduct=1101, bcdDevice= 0.01
d’oct. 17 21:02:15 asus-arch-icar kernel: usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
d’oct. 17 21:02:15 asus-arch-icar kernel: usb 1-4: Product: LaserPen_V2.52
d’oct. 17 21:02:15 asus-arch-icar kernel: usb 1-4: Manufacturer: YSTEK
d’oct. 17 21:02:15 asus-arch-icar kernel: input: YSTEK LaserPen_V2.52 as /devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.0/0003:276D:1101.000A/input/input31
d’oct. 17 21:02:15 asus-arch-icar kernel: hid-generic 0003:276D:1101.000A: input,hidraw1: USB HID v1.11 Keyboard [YSTEK LaserPen_V2.52] on usb-0000:03:00.3-4/input0
d’oct. 17 21:02:15 asus-arch-icar kernel: input: YSTEK LaserPen_V2.52 Mouse as /devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.1/0003:276D:1101.000B/input/input32
d’oct. 17 21:02:15 asus-arch-icar kernel: input: YSTEK LaserPen_V2.52 Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.1/0003:276D:1101.000B/input/input33
d’oct. 17 21:02:15 asus-arch-icar kernel: input: YSTEK LaserPen_V2.52 System Control as /devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.1/0003:276D:1101.000B/input/input34
d’oct. 17 21:02:15 asus-arch-icar kernel: hid-generic 0003:276D:1101.000B: input,hidraw2: USB HID v1.11 Mouse [YSTEK LaserPen_V2.52] on usb-0000:03:00.3-4/input1
d’oct. 17 21:02:15 asus-arch-icar mtp-probe[31962]: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4"
d’oct. 17 21:02:15 asus-arch-icar mtp-probe[31962]: bus: 1, device: 6 was not an MTP device
d’oct. 17 21:02:15 asus-arch-icar systemd-logind[681]: Watching system buttons on /dev/input/event13 (YSTEK LaserPen_V2.52)
d’oct. 17 21:02:15 asus-arch-icar systemd-logind[681]: Watching system buttons on /dev/input/event15 (YSTEK LaserPen_V2.52 Consumer Control)
d’oct. 17 21:02:15 asus-arch-icar systemd-logind[681]: Watching system buttons on /dev/input/event16 (YSTEK LaserPen_V2.52 System Control)
d’oct. 17 21:02:15 asus-arch-icar mtp-probe[31990]: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4"
d’oct. 17 21:02:15 asus-arch-icar mtp-probe[31990]: bus: 1, device: 6 was not an MTP device

And the lsusb output:

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 005: ID 04f3:0903 Elan Microelectronics Corp. ELAN:Fingerprint
Bus 003 Device 004: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 003 Device 003: ID 13d3:56dd IMC Networks USB2.0 HD UVC WebCam
Bus 003 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 276d:1101 YSTEK LaserPen_V2.52
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I am a bit lost on what to do. As far as I can see, /devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.0/0003:276D:1101.000A/input/input31 is detected as a keyboard, which should suffice, but does nothing. I've been poking around in /sys/devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.0/0003:276D:1101.000A/input/input31/ with no luck. The name, properties, etc in those pseudo-files correctly match the hardware.

Any ideas would be highly appreciated. Thanks.

seth

Member

Registered: 2012-09-03

Posts: 63,405

Re: 2.4GHz TV Remote

aliexpress link is 404 (might be regional issue?)

For clarification: the device originally ceased to function on MacOS (?) so you tried it on a different laptop running archlinux where it shows up but also doesn't work?
Just because it makes the LED flash doesn't mean it fires a radio signal; the latter requires abysmally more power (mostly b/c the LED requires close to none) so if the thing is battery driven (couldn't find anything about YSTEK LaserPen's…) I'd first and foremost change those.

When you say "clicking button does nothing", does that mean in sudo "evtest" or "libinput debug-events"?

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

icar

Member

From: Catalunya

Registered: 2020-07-31

Posts: 535

Re: 2.4GHz TV Remote

I don't know what to say about the link, it's working for me. Here's the photo of it, extracted from the Aliexpress page's HTML: https://ae01.alicdn.com/kf/H4b7dc3bb58d … .jpg_.webp

It originally ceased to function on LibreElec on a iMac. So yes, I tried on my ArchLinux laptop, and here I am.

The remote is powered by 2x AAA non-rehcargable batteries that have had 1 week of usage.

evtest reports these:

/dev/input/event13:	YSTEK LaserPen_V2.52
/dev/input/event14:	YSTEK LaserPen_V2.52 Mouse
/dev/input/event15:	YSTEK LaserPen_V2.52 Consumer Control
/dev/input/event16:	YSTEK LaserPen_V2.52 System Control

and, selecting one by one and testing, neither of them output anything when using any key on the remote.

libinput debug-events reports:

❯ sudo libinput debug-events 
-event2   DEVICE_ADDED            Power Button                      seat0 default group1  cap:k
-event3   DEVICE_ADDED            Video Bus                         seat0 default group2  cap:k
-event0   DEVICE_ADDED            Lid Switch                        seat0 default group3  cap:S
-event1   DEVICE_ADDED            Power Button                      seat0 default group4  cap:k
-event13  DEVICE_ADDED            YSTEK LaserPen_V2.52              seat0 default group5  cap:k
-event14  DEVICE_ADDED            YSTEK LaserPen_V2.52 Mouse        seat0 default group5  cap:p left scroll-nat scroll-button
-event15  DEVICE_ADDED            YSTEK LaserPen_V2.52 Consumer Control seat0 default group5  cap:kp scroll-nat
-event16  DEVICE_ADDED            YSTEK LaserPen_V2.52 System Control seat0 default group5  cap:k
-event9   DEVICE_ADDED            USB2.0 HD UVC WebCam: USB2.0 HD   seat0 default group6  cap:k
-event8   DEVICE_ADDED            ELAN1301:00 04F3:3115 Touchpad    seat0 default group7  cap:pg  size 100x57mm tap(dl off) left scroll-nat scroll-2fg-edge click-buttonareas-clickfinger dwt-on dwtp-on
-event7   DEVICE_ADDED            ELAN1301:00 04F3:3115 Mouse       seat0 default group7  cap:p left scroll-nat scroll-button
-event6   DEVICE_ADDED            Asus WMI hotkeys                  seat0 default group8  cap:k
-event4   DEVICE_ADDED            AT Translated Set 2 keyboard      seat0 default group9  cap:k

and after repeatedly pressing all keys of the remote, it doesn't output anything else.

seth

Member

Registered: 2012-09-03

Posts: 63,405

Re: 2.4GHz TV Remote

The remote is powered by 2x AAA non-rehcargable batteries that have had 1 week of usage

Did you try to change them? Or at least took them out and re-inserted them after some minutes (effectively "re-booting" the RC)

It's disfunctional across heterogenous hosts and there seems no indication that the dongle wouldn't report, so I'd focus on the RC.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

icar

Member

From: Catalunya

Registered: 2020-07-31

Posts: 535

Re: 2.4GHz TV Remote

Sorry for not responding. I did buy some new batteries, and it still did not work. After trying on a macOS and still not working, I blamed the hardware.