|
|
Hi Bcan Yeh, If SWAN didn't boot normally, then how can we make it normal ? Should we download boot image via SPI ? |
|
|
Hi Mr.Yoon, Yes, if this problem happened, the only way to save the devices is to burn image through SPI card. |
|
|
1. In Synaptics's EVK, there is only recovery UI for user to update fw. There are many functions related to update fw. Including a. Reboot system now b. Reboot to bootloader c. Enter fastboot d. Apply update from ADB e. Apply update from SD card f. Wipe data/factory reset g. Wipe cache partition i. Mount /system j. View recovery logs k. Run graphics test l. Run locale test m. Enter rescue n. Power off For a basic OTA, we need to do (1) Go to the recovery UI (command: reboot recovery) (2) Choose e. and select a ota file (3) Wait until e is completed (about 144 sec) (4) Reboot system now 2. In SWAN, SPTek combined some basic functions and made a smooth OTA flow. So users do not have to do each step one by one. And the recovery UI is also removed in SWAN. 3. For this issue. We can reproduce it in EVK with below steps. (1)Update synaptics EVK with eMMCimg [202001091127]. (2)Boot up EVK, reboot recovery, Apply update from SD card (3)Update with ota file sequoia-ota-202004011336.zip (4)Power off at 30 sec. (5)Power on EVK and it show Android Recovery UI (6)Power off and on. (7)The problem happens. a. The screen shows boot logo and black screen repeatedly. b. The console shows specific log repeatedly. And Synaptics said the flow could be changed to show Android Recovery UI again after step (6). If so, there will be no problem. Because the OTA flow of Synaptics and SPTek are different, we can not distinguish where is the root cause. For clarifying this, it is necessary to have Synaptics and SPTek work together to solve this problem. ps. Attached picture is the recovery UI. S__155590696.jpg (212,632 bytes) |
|
|
While this problem happens 1. Power off 2. Keep pressing ch- and vol- on the front panel 3. Power on 4. Go to recovery mode. 5. In recovery mode, it will check usb disk for OTA file. If there is no OTA file found, the box will download OTA file from ftp server. 6. After OTA, it can boot up normally. |
- yk.jung ( (ALTech) Younkwang Jung ) developer
