Lỗi bộ nhớ
[ 0.973272] vc_vchi_sm_init: failed to open VCHI service (-1) [ 0.973370] [vc_sm_connected_init]: failed to initialize shared memory service
Dùng lệnh raspi-config –> 7. Advanced Options -> A3. Memory Split nhập giá trị lớn hơn 16
Lỗi HDD cache
3.607219] sd 0:0:0:0: [sda] No Caching mode page found [ 3.612789] sd 0:0:0:0: [sda] Assuming drive cache: write through
HDD ở sda không có thông tin về cache. Bỏ qua thông báo này!
Lỗi Bluetooth và SAP
pi@raspberry:~# systemctl status bluetooth ● bluetooth.service - Bluetooth service Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled) Active: active (running) since Sun 2018-05-13 11:01:41 +07; 45min ago Docs: man:bluetoothd(8) Main PID: 455 (bluetoothd) Status: "Running" CGroup: /system.slice/bluetooth.service └─455 /usr/lib/bluetooth/bluetoothd May 13 11:01:41 mail.lyle systemd[1]: Starting Bluetooth service... May 13 11:01:41 mail.lyle bluetoothd[455]: Bluetooth daemon 5.43 May 13 11:01:41 mail.lyle systemd[1]: Started Bluetooth service. May 13 11:01:41 mail.lyle bluetoothd[455]: Starting SDP server May 13 11:01:41 mail.lyle bluetoothd[455]: Bluetooth management interface 1.14 initialized May 13 11:01:41 mail.lyle bluetoothd[455]: Failed to obtain handles for "Service Changed" characteristic May 13 11:01:41 mail.lyle bluetoothd[455]: Sap driver initialization failed. May 13 11:01:41 mail.lyle bluetoothd[455]: sap-server: Operation not permitted (1)
Các lỗi về Bluetooth phần nhiều sẽ được sửa sau khi update RPi
apt-get update && apt-get upgrade -y rpi-update
SAP viết tắt của SIM Access Profile, vì vậy có thể disabled nó.
#Bỏ SAP sed -r -i 's|^(ExecStart=/usr/lib/bluetooth/bluetoothd).*$|\1 --noplugin=sap|' /etc/systemd/system/bluetooth.target.wants/bluetooth.service #reload systemctl sudo systemctl daemon-reload #restart bluetooth sudo service bluetooth restart