As mentioned in my previous blog post, I have written a new patch series for 6.2 to try to avoid having multiple entries in /sys/class/backlight for a single panel again ( Read more... )

I have received quite a few test reports in response to my previous blog post. Many thanks to everyone who has run the tests and send me their results ( Read more... )

I have landed a large(ish) refactor of the ACPI/x86 backlight detection code in the kernel for 6.1. I have been very careful to try and not break things but there is a special group of laptops where the ability to control the backlight brightness may disappear because of this ( Read more... )

Starting with kernel 5.17 the kernel supports the builtin privacy screens built into the LCD panel of some new laptop models ( Read more... )

Recently I acquired an Acer Aspire Switch 10 E SW3-016, this device was the main reason for writing my blog post about the shim boot loop. The EFI firmware of this is bad in a number of ways:

1. It considers its eMMC unbootable unless its ESP contains an EFI/Microsoft/Boot/bootmgfw.efi file.
2. But it will actually boot EFI/Boot/bootx64.efi ! (wait what? ( Read more... )

A while ago as a spin-off of my project to improve support for Logitech wireless keyboards and mice I have also done some work on improving support for (Gaming) keyboards with a builtin LCD panel ( Read more... )

I got contacted by a user with a HP X2 10 p018wm 2-in-1 about the device waking up 10-60 seconds after suspend. I have access to a HP X2 10 p002nd myself which in essence is the same HW and I managed to reproduce the problem there. This is when the fun started ( Read more... )

The just released 5.2-rc1 kernel includes improved support for Logitech wireless keyboards and mice. Until now we were relying on the generic HID keyboard and mouse emulation for 27 MHz and non-unifying 2.4 GHz wireless receivers ( Read more... )

Once upon a time a driver was written for the Lenovo Ideapad firmware interface for handling special keys and rfkill functionality. This driver was written on an Ideapad laptop with a slider on the side to turn wifi on/off, a so called hardware rfkill switch. Sometime later a Yoga model using the same firmware interface showed up, without a ( Read more... )

There have been questions about the Fedora 30 Flicker Free Boot Change in various places, here is a FAQ which hopefully answers most questions:
1) I get a black screen for a couple of seconds during boot?
1.1) If you have an AMD or Nvidia GPU driving your screen, then this is normal. The graphics drivers for AMD and Nvidia GPUs reset the hardware ( Read more... )