[Intel-gfx] Bay trail-M N2920 S3 DDI1_BKLTCTL

Jani Nikula jani.nikula at linux.intel.com
Mon Feb 22 08:31:01 UTC 2016

On Mon, 22 Feb 2016, "shadow.yang" <Shadow.Yang at advantech.com.tw> wrote:
> The system platform is Bay trail-M N2920.
> The DDI1_BKLTCTL has output at S3 resume on WIN7 /8.
> but Linux ubuntu 1404 Kernel 3.19 the DDI1_BKLTCTL is no signal at S3
> resume.
> The xrand and dmesg file please reference the attachment.
> "dmesg.log" /  "xrand.log" before enter S3.
> "dmesg_S3.log" /  "xrand_S3.log" after enter S3.
> We are using Legacy VBIOS.
> To update the Fedora23's LiveCD,the DDI1_BKLTCTL still no output PWM.
> Do you have suggestion for this issue?

Please file a bug at [1]. Add drm.debug=14 module parameter, and attach
dmesg to the bug.


[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

Jani Nikula, Intel Open Source Technology Center

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