Hi Alex Deucher, The rtl8821a_config.bin is not necessary. It is used for some special settings, such as bdaddr, sco over pcm/hci, etc. Thanks, BRs, Alex Lu. -----邮件原件----- 发件人: Alex Deucher [mailto:alexdeucher@xxxxxxxxx] 发送时间: 2017年8月23日 10:09 收件人: linux-bluetooth@xxxxxxxxxxxxxxx; 陆朱伟; Larry.Finger@xxxxxxxxxxxx 主题: RTL8822BE Bluetooth device I have this device, but the driver requires a firmware file (rtl8821a_config.bin) which does not seem to exist. Looking at the code[1], there appear to be several firmware config files for variants of this device: + switch (lmp_subver) { + case RTL_ROM_LMP_8723B: + cfg_name = "rtl_bt/rtl8723b_config.bin"; break; case + RTL_ROM_LMP_8821A: + cfg_name = "rtl_bt/rtl8821a_config.bin"; break; case + RTL_ROM_LMP_8761A: + cfg_name = "rtl_bt/rtl8761a_config.bin"; break; case + RTL_ROM_LMP_8822B: + cfg_name = "rtl_bt/rtl8822b_config.bin"; break; However, the only file that seem to actually exist is rtl8822b_config.bin. Does anyone know where to get the others? Thanks, Alex [1] https://patchwork.kernel.org/patch/9323749/ ------Please consider the environment before printing this e-mail. ��.n��������+%������w��{.n�����{����^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�