E-ink panels FBIO_WAITFORVSYNC error

[chenyc1]

use IMX7DSabre and IMXEBOOKDC4

OS version：android7.1.1

the system run so slow on E-ink panels when switching interface

i get some log from logcat：

1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.103 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.104 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.104 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.106 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.517 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.517 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.517 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument
1970-01-01 08:06:11.517 202-230/? E/hwcomposer: FBIO_WAITFORVSYNC error: Invalid argument

[gusarambula]

Hello Tyler Chen,

Would you please provide more details on what you mean by "switching interface" ? Would you please share the steps to reproduce this?

If possible we could recommend switching latest android BSP for imx7D and verify if the issue still persist.

As you can see in the thread below, the issue went away when switching to latest BSP.

https://community.nxp.com/thread/314641

Regards,

[gusarambula]

Hello Tyler Chen,

From the error log, this seems to be EGL issue

"SurfaceFlinger: no suitable EGLConfig found, trying a simpler query"

Would you please check that kernel you are using and EGL library are compatible? From the logs we can observe that it is using slow EGL:

"SurfaceFlinger: EGL_SLOW_CONFIG selected!"

Regards,