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kurtis318/Fix_F29_KDE_tty_keyboard_shortcuts_and_display_brightness_on_Dell_XPS_15.md

Created November 10, 2018 06:10
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Fix F29 KDE tty keyboard shortcuts and display brightness on Dell XPS 15
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Fix_F29_KDE_tty_keyboard_shortcuts_and_display_brightness_on_Dell_XPS_15.md

Issue1:

I noticed while performing a fresh install of Fedora 29 on my Dell XPS 15 that the keyboard shortcuts to switch to alternate tty session did not work. Control-Alt-4 was the only one that would get me a tty but I could never get back to the Xorg session (control-alt-1 did not work).

Solution1:

This was solved by adding the following as permanent kernel boot parameters in /etc/default/grub and recreating /etc/grub2/grub.cfg (grub2-mkconfig -o /boot/grub2/grub.cfg). Here are the boot parameters that I believe need to be added in the exact order:

acpi_osi=! acpi_osi=Linuxacpi_osi="Windows 2009"

Issue2:

Later I noticed that the the KDE power widget display brightnes in the notification widget was working strangely. The brightness could be changed only changed the brightness half way. Moving the slider farther left would actually DIM the display. Some movements of the slider to the dimmest setting would temporaily freeze the KDE desktop. If I wanted long enough, the KDE desktop would come back.

Solution2:

The solution to this issue is to add the following kernel boot parameter and re-create /boot/grub2/grub.cfg

video.use_native_backlight=1
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