[Bug 63791] New: Display too bright, DVI output, Intel Haswell graphics

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=63791

            Bug ID: 63791
           Summary: Display too bright, DVI output, Intel Haswell graphics
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.11.0-13-generic #20~precise2-Ubuntu
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: pmike2001 at mail.ru
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 112311
  --> https://bugzilla.kernel.org/attachment.cgi?id=112311&action=edit
dmesg with drm.debug=0xe

I've upgraded kernel from 3.8.0-33 to 3.11.0-13 (Ubuntu-baked kernels), and
display brightness increased significantly. It's possible to modify gamma, but
it doesn't affect *brightness* (or maybe backlight level).

My HW is: Intel Core i5-4570S CPU build-in graphics, connected to flat-panel
monitor via DVI-to-HDMI cable.

PS. acpi_backlight=vendor does not have any effect.
PPS. 3.12-rcX kernels have same issue.

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