[Bug 93728] New: [byt-m edp] Fuzzy display with i915 via eDP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93728

            Bug ID: 93728
           Summary: [byt-m edp] Fuzzy display with i915 via eDP
           Product: DRI
           Version: XOrg git
          Hardware: Other
               URL: https://bugzilla.kernel.org/show_bug.cgi?id=89251
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jani.nikula at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Moving from https://bugzilla.kernel.org/show_bug.cgi?id=89251

I have a small panel PC with Intel BayTrail-M chipset. Once the i915 driver is
loaded, the display (internally connected via eDP) shows every second pixel
line shifted one pixel to the right, which leads to "fuzzy" graphics. Booting
with "nomodeset" avoids the problem (see attachment). I tested with 3.16, 3.17
and 3.18 (problem persists).

PC: http://www.winmate.com.tw/TabletPC/TabletPCSpec.asp?Prod=13_0184
lspci output: 00:02.0 VGA compatible controller: Intel Corporation Atom
Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0c)

...

Problem persists with 4.2.5, unfortunately.

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