sonyan11

@TzuWen_Chang Hello. Thank you so much for your kind advice. I will try. Best regards,

Dear @tooz, I deeply appreciate for your support. We have confirmed that the impact is reduced when using 5GHz. When using 2.4GHz, is it possible to mitigate the impact through driver tweaks or similar measures? Or would hardware modifications (antenna positions) be necessary? Best regards，

Hello, I use Tinker 3S with latest Tinker OS. I connected a high-power USB 3 camera module (800 mA). At the same time, my Tinker board is periodically accessed over Wi-Fi by a web client (it runs a web server). When I cut the power to the Wi-Fi router, the USB camera capture suddenly starts failing in bursts. This is reproducible. If I disable Wi-Fi power saving mode (see attached code), the problem disappears. echo "options 8822ce rtw_power_mgnt=0 rtw_ips_mode=0 rtw_lps_level=0 rtw_low_power=0" \ | sudo tee /etc/modprobe.d/8822ce.conf However, I would like to avoid disabling power saving mode if possible. What do you think is happening here?

@TzuWen_Chang Thank you so much for your response. It works! Thank you!

Hello. Since Tinkerboard3 has been released, I've migrated my development environment to Tinker3. Can I still control USB power delivery with Tinker3? Best regards,

Dear @tooz Thank you so much, I have updated kenel and have successfully control the vbus. I am super happy to get this result. I deeply appreciate your contribution to this forum. Best regards,

@tooz Hello. I followed your instruction about usb-c. I use "linux4.4 debian10". echo on > /sys/kernel/debug/fe800000.dwc3/vbus echo off > /sys/kernel/debug/fe800000.dwc3/vbus The result is -bash: /sys/kernel/debug/fe800000.dwc3/vbus: Permission denied I cannot find vbus as follows. ~# ls /sys/kernel/debug/fe800000.dwc3/ ep0in ep1in ep2in ep3in ep4in ep5in ep6in mode testmode ep0out ep1out ep2out ep3out ep4out ep5out link_state regdump I would be grateful if you could help me.

Dear @tooz, Thank you very much for your comment. I apologize for not presenting my environment first. I use Kernel 4.4. I have done the followings and still the UVC is not recognized as a module. 1. Installing the build tools $ sudo apt-get install git-core gitk git-gui gcc-arm-linux-gnueabihf device-tree-compiler gcc-aarch64-linux-gnu mtools parted libssl-dev 2. Build Kernel $ cd [source code] $ make ARCH=arm64 tinker2_defconfig $ make menuconfig Modify USB Video Class to module. Device Drivers> Multimedia Support > Media USB Adapters > USB Video Class [*] → [M] $ make ARCH=arm64 rk3399-tinker_board_2.img CROSS_COMPILE=aarch64-linux-gnu- -j8 3. Install Kernel $ sudo dd if=boot.img of=/dev/mmcblk1p4 status=progress && sync $ sudo reboot Please let me know if I am missing a process that we need. Best regards,

Hello. I use tinker board 2S. Previously, I received following advice about UVC Cam. Now I tried to change uvc cam setting to module by following https://github.com/TinkerBoard/TinkerBoard/wiki/Developer-Guide. However, I cannot find uvc related topic at make menuconfig Please tell me the correct way to change .config in order to compiled uvcvideo driver to module. Best regards,

Hello, I use Tinker board 2S. OS: Tinker Board 2 Debian 10 V2.1.6 I would like to change quirks of uvcvideo driver. I tried: sudo modinfo uvcvideo and got: modinfo: ERROR: Module uvcvideo not found. I also tried sudo modprobe uvcvideo quirks=0x80 ,but cannot find any changes in /sys/module/uvcvideo/parameters/quirks. It looks like it's not working properly. Anyone know how to deal with this? Unfortunately, I do not have much experience in Linux Kernel, please let me know if my question is completely out of scope. Best regards,