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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Display not working with i915 driver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109267#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [GLK DSI] Display not working with i915 driver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109267">bug 109267</a>
from <span class="vcard"><a class="email" href="mailto:markwynngarcia@outlook.com" title="Mark Wynn Garcia <markwynngarcia@outlook.com>"> <span class="fn">Mark Wynn Garcia</span></a>
</span></b>
<pre>I'll be posting the pinctrl outputs as follow up attachments. I am not able to
use `modprobe i915` after disabling i915 using module_blacklist=i915
(<a href="https://wiki.archlinux.org/index.php/Kernel_module#Using_kernel_command_line">https://wiki.archlinux.org/index.php/Kernel_module#Using_kernel_command_line</a>)
as it seems that there is a path in the kernel module loading function itself
that blocks anything in the module_blacklist even after the boot process, so
modprobe returns an error. Using modprobe blacklist + initramfs/mkinitcpio even
including i915's dependencies doesn't work at all.
Anyway I did still manage to get pinctrl output for the following:
* i915 disabled, with grub GFX_PAYLOAD=800x1280
* normal boot (unmodified kernel and boot params) without X11
* normal boot within X11
* normal boot within X11 after `xrandr --output DSI-1 --off`, which turns off
the backlight of the screen perhaps among other things
All are done with an external monitor connected through USB-C (DP alternate
mode I think) -> hub -> HDMI. I have to note that when i915 is disabled only
the laptop's screen has output (that's why I have to use GFX_PAYLOAD because
otherwise the output is garbage). Also, for normal boot the console is shown on
the external monitor by default (thankfully).</pre>
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