[Bug 94245] New: Lubuntu 1404 Kernel 3.19 the DDI1_BKLTCTL is no signal at S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94245

            Bug ID: 94245
           Summary: Lubuntu 1404 Kernel 3.19 the DDI1_BKLTCTL is no signal
                    at S3
           Product: DRI
           Version: XOrg git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: shadow.yang at advantech.com.tw
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121876
  --> https://bugs.freedesktop.org/attachment.cgi?id=121876&action=edit
dmesg_S3.log & xrandr_S3.log

How often does the steps listed above trigger the issue?  always
The following information about system:
-- system architecture: i686
-- kernel version: 3.19
-- Linux distribution: Lubuntu
-- Machine or mother board model:Bay trail-M N2920
-- Display connector: HDMI, DP, VGA
-- Kernel Parameter: drm.debug=0x1e, log_buf_len=1M 

The DDI1_BKLTCTL has output at S3 resume on WIN7 /8, but Lubuntu 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" resume from S3.

We are using Legacy VBIOS. To update the Fedora23's LiveCD,the DDI1_BKLTCTL
still no output PWM.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160222/179e9eaa/attachment.html>