[Bug 91295] New: System hangs on resume because of Intel Rapid Start Technology

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91295

            Bug ID: 91295
           Summary: System hangs on resume because of Intel Rapid Start
                    Technology
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: gabriele.mzt at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117033
  --> https://bugs.freedesktop.org/attachment.cgi?id=117033&action=edit
dmesg - hang on resume

My laptop supports Intel Rapid Start Technology, which is a firmware feature
that makes the system suspend to disk after it has been in S3 for a while. As
far as I know, the OS is not aware of this and on resume it acts as if the
system had only been in S3.

This has worked flawlessly until recently. Starting from kernel v4.2 (I tested
rc1 and some previous snapshots) the system hangs on resume. There are no
issues if the laptop is simply suspended and the firmware doesn't make the
system suspend to disk.

Here attached there's the dmesg in which there's suggested to report the issue
here.

I used drm-intel-nightly (28217ad8476e98c106c3f78e06140b052e2b6b38) to get
these logs.

Just a note: things are worse compared to 4.2-rc1 since X becomes usable after
a while, while I had to switch to tty to get the logs with drm-intel-nightly. 

Please, tell me if you need more information.

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