[Bug 104198] New: [i915] [device 591b] Xorg with framebuffer driver corrupt text / font

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104198

            Bug ID: 104198
           Summary: [i915] [device 591b] Xorg with framebuffer driver
                    corrupt text / font
           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: michael.pihlblad at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

i have a Thinkpad T470-P which is equipped with Intel HD graphics 630

00:02.0 VGA compatible controller: Intel Corporation Device 591b (rev 04)

I have a big issue with text getting corrupt, complete rows get messed up, 
most problem in Qtcreator but also noticed it in Konsole.

kernel module loaded for the graphics card is i915.

Xorg is default using fbdevhw when booting stock kernel and with kernel
4.14.4-041404 it is using modesetting driver with submodule fb.

I tried changing font, changing font settings like anti aliasing, sub pixel
rendering e.t.c. without any luck.

I tried upgrading the kernel to 4.14.4-041404, upgrading the bios. 





Misc info:

I have installed Kubuntu 17.04, It works almost fine out of the box.

The size of everything on the screen was very small so i scaled it to 1.1 in
KDE settings. Increased fonts sizes and forced DPI to 120.

I tried upgrading graphics drivers with intel graphics update tool 2.06:
https://01.org/linuxgraphics/downloads/intel-graphics-update-tool-linux-os-v2.0.6

But it caused waking up from suspend to not work, seems the screen is not
enabled, also the adjusting of the backlight stoped working. 


Thank you.

// Michael

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