[Bug 108279] New: [Ubuntu 18.10] eDP resolution 640x360 failed on WHLU and ICL-U/Y.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108279

            Bug ID: 108279
           Summary: [Ubuntu 18.10] eDP resolution 640x360 failed on WHLU
                    and ICL-U/Y.
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: quanxian.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

System Environment
=======
Platform Info:
Label: WHLU01
Processor: Genuine Intel(R) CPU 0000 @ 1.60GHz
Bios: CNLSFWR1.R00.X137.B00.1803280218
OS: Ubuntu 18.10
Kernel: 4.18.0-9-generic

Regression?
=======
seems be

Bug detailed description
=======
Platform Info:
Label: WHLU01
Processor: Genuine Intel(R) CPU 0000 @ 1.60GHz
Bios: CNLSFWR1.R00.X137.B00.1803280218
OS: Ubuntu 18.10
Kernel: 4.17.0-9-generic

Details:
Execute the command "xrandr -s 640x360", the desktop would hang except the
mouse can move. The keyboard cannot input anything. At this moment, the ssh is
connected.

The dmesg log is null in collected dmesg log when bug occured, so just attach
the journalctl log.

Reproduce Steps
==============
xrandr -s "640x360"

Expected Result
=============
work normally

Actual Result
===========
gpu hang

Analysis & Root Cause
===================
Other tens resolution are fine, only 640x360 has the issue. This should be some
alignment issue? I will attach dmesg.log and journalctl.log for your analysis.

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