[Bug 98813] New: Screen goes black when booting kernel with KMS enabled.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98813

            Bug ID: 98813
           Summary: Screen goes black when booting kernel with KMS
                    enabled.
           Product: DRI
           Version: unspecified
          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: shadoe_da_deaddonkey at yahoo.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 128131
  --> https://bugs.freedesktop.org/attachment.cgi?id=128131&action=edit
dmesg output with drm.debug=14

Attached is output from "dmesg" and "lshw".


-- system architecture: 64-bit

-- kernel: 4.9.0-994

-- Linux distribution: Ubuntu Gnome 16.04

-- Machine or mobo model: Tesco Windows Connect

-- Display connector: ???

I'm using a  10.1-inch Cherry Trail tablet. The kernel is drm-intel-nightly
branch (drm.debug=14) and is 64-bit booting from a 32-bit uefi with grub2
(dunno if that's relevant or not).

When I boot, text scrolls down the screen and after a few seconds the text gets
wiped off leaving a black screen.  This issue does not correct itself, but I
can type commands into a tty without remote access (just can't see the commands
I type in).

I'm not sure if this is the right channel to report this, and I appreciate
there are other details I may need to provide.

Thanks.

p.s 
As noted in similar bug reports, there are other problems with the device as
well. I don't have any audio (not sure if that's because I've not got the right
driver), and there's problems with hardware buttons and sleep mode.

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