Created attachment 120305 [details] dmesg file I have a board based on Intel Atom E38xx (Bay Trail), if I plug HDMI/DP and an eDP, when I control the brightness value, I see some flicker on eDP. Other problem is about S3 state(standby), when I return from standby, the eDP is off and my board freezes. If I plug only the eDP, I don't see any bug, the brightness control works fine and the S3 state works fine. System information : - system architecture : i686 - kernel version : 4.4.0-rc2+ - linux ubuntu 15.10 - display connection : HDMI/DP and eDP Attached: - dmesg.txt - xrandr.txt - intel_reg_dumper.txt
Created attachment 120306 [details] xrandr file
Created attachment 120307 [details] intel_reg_dumper file
Do you have some local, non-upstream modifications in the kernel? Please add drm.debug=14 module parameter, and attach dmesg all the way from boot to the problem. The early boot is missing and the logs are filled with atomic debugging.
I don't have any local, non-upstream modifications in the kernel Attached the dmesg file with drm.debug=14 parameter.
Created attachment 120348 [details] dmesg with drm.debug=14
Hello Marco I think there is a mistake in the latest attachment, if you check the kernel command line it still shows drm.debug=0x1e instead of drm.debug=0x14.
Created attachment 120566 [details] dmesg with drm.debug=14 the correct dmesg with drm.debug=14
There are some issues in the logs that we think we've fixed. Closing. Please reopen if the problem persists with latest kernels.
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