[Bug 104807] blank screen after drm initialization - trekstor twin 10.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104807

--- Comment #12 from hexdump <hexdump0815 at googlemail.com> ---
hello,

i have rebuilt the kernel, keeping all your notes from above in mind, i.e.

MFD_AXP20X_I2C=y
I2C_DESIGNWARE_PLATFORM=y
I2C_DESIGNWARE_BAYTRAIL=y
XPOWER_PMIC_OPREGION=y

then i rebuilt the initramfs with dracut with the i915 module removed, so that
it loads later and the result is that the load order of pwm and i915 is now
right (see attached new dmesg). sadly the screen still gets black as soon as
the i915 module gets loaded (tested too via booting with init=/bin/sh and
loading it by hand on the cmdline). its really funny: in the fully botted
system i can still blindly login to the properly running lxde session and even
dpms turns off the backlight after a while and pressing a key or mouse button
brings it back, but all this just with an empty screen.

i ran across https://bugs.freedesktop.org/show_bug.cgi?id=96923 which seems to
be exactly the same problem with no real solution - my tablet has the same
innolux 8x12 panel entry in the bios as mentioned in that ticket (maybe the
same hardware sold under a different label).

attachments coming: updated dmesg with proper pwm & i915 load order, new kernel
config and acpidump as requested.

a lot of thanks and best wishes - thomas

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180129/3fbe9526/attachment.html>