CM-T335: Linux: Known Issues

Enlightenment Window Manager

If the Touchscreen profile is selected the Settings Panel doesn't have Profiles setting menu. It is not possible to switch the profile. Workaround : Launch the xterm from Applications->Accessories and change the default profile from the command line: enlightenment_remote -default-profile-set Standard-copy

Frame buffer console

Sometimes the Frame buffer console is not visible and not possible to use. Workaround : Use the serial or network ssh console.

Bluetooth initialization timed out

Sometimes attaching the ttyO1 serial port to the HCI Bluetooth subsystem can time out with the following message: root@cm-debian:~# hciattach -s 115200 /dev/ttyO1 texas 3000000 Initialization timed out. Workaround : Reset the WL1271 Bluetooth module manually, then run the hciattach command again: root@cm-debian:~# echo 0 > /sys/class/gpio/gpio19/value root@cm-debian:~# echo 1 > /sys/class/gpio/gpio19/value root@cm-debian:~# hciattach -s 115200 /dev/ttyO1 texas 3000000 Found a Texas Instruments' chip! Firmware file : /lib/firmware/TIInit_7.6.15.bts Loaded BTS script version 1 texas: changing baud rate to 3000000, flow control to 1 [ 406.694167] Bluetooth: HCI UART driver ver 2.2 [ 406.698847] Bluetooth: HCI H4 protocol initialized [ 406.703912] Bluetooth: HCI BCSP protocol initialized [ 406.709097] Bluetooth: HCILL protocol initialized Device setup complete

Network interface name change

Network interface name can change if used with rootfs on NFS by more then a single CM-T335 unit. Workaround 1: Delete the udev persistent network interface rules file - should be repeated after every unit replacement: root@cm-debian:~# rm /etc/udev/rules.d/70-persistent-net.rules root@cm-debian:~# reboot Workaround 2: Disable persistent network interface rules: root@cm-debian:~# echo "# disable net-generator rules in /lib/udev" > /etc/udev/rules.d/75-persistent-net-generator.rules root@cm-debian:~# reboot