[Bug 112018] New: I7-8700 onboard HDMI port does not support 4K resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112018

            Bug ID: 112018
           Summary: I7-8700 onboard HDMI port does not support 4K
                    resolution
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jian-hong at endlessm.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 145751
  --> https://bugs.freedesktop.org/attachment.cgi?id=145751&action=edit
xrandr shows available resolustions

We have a desktop equipped with i7-8700.  Its onboard HDMI port cannot support
up to resolution 3840*2160 on Linux (mainline kernel 5.4-rc3+).  But Windows
supports (must do Windows update to latest which includes the graphic driver).

The graphic information

00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 630
(Desktop) [8086:3e92] (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] UHD Graphics 630 (Desktop)
[1025:124e]
        Flags: bus master, fast devsel, latency 0, IRQ 138
        Memory at a1000000 (64-bit, non-prefetchable) [size=16M]
        Memory at 90000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 5000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [40] Vendor Specific Information: Len=0c <?>
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [100] Process Address Space ID (PASID)
        Capabilities: [200] Address Translation Service (ATS)
        Capabilities: [300] Page Request Interface (PRI)
        Kernel driver in use: i915
        Kernel modules: i915

We also check the onboard display port.  Display port can support up to
resolution 3840*2160 on Linux.

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