[Bug 101168] New: [i915][SKL] Kernel ignoring custom modeline - cannot set monitors full resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101168

            Bug ID: 101168
           Summary: [i915][SKL] Kernel ignoring custom modeline - cannot
                    set monitors full resolution
           Product: DRI
           Version: XOrg 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: loomsen at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 131470
  --> https://bugs.freedesktop.org/attachment.cgi?id=131470&action=edit
dmesg with drm.debug=0x1e log_buf_len=1M

Hi.

Ever since I upgraded to kernels >4.11, I'm unable to set the maximum supported
resolution. I have a WQHD monitor with a resolution of 2560x1440. With kernels
prior to 4.11 it would pick up my custom modeline I configured in
/etc/X11/xorg.conf.d and show full resolution. With newer kernels max supported
resolution seems to be only 2048x1152.

How often:
Every time

uname -rm:
4.11.2 x86_64

Distro:
Fedora

Motherboard:
MSI Z170A PC MATE

Display connector:
HDMI (via a DVI-D to HDMI adapter)

Dmesg attached. Please let me know if I can provide any further assistance.

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