Skip to main content

Easy way to fix non functional ctrl key

Ctrl key buttons refused to work on laptop?
  • Tried pressing Ctrl + Alt + Fn? Mixed result.
  • Reboot hardware? No dice.
  • Pressing Ctrl + Left click on Touchpad? Worked

I am not sure what exactly caused the problem as the issue surprisingly affects more models than expected.

Comments

You are using Gnome and installed most likely with Anaconda. nevertheless, here is some thing to review

# This note explains how to remove two key combinations that interfere with the keyboard when used with GNOME
# The problem manifests itself when trying to use the key above the [tab] and to the left of the [1]
# Without following the instructions herein, that [~ `] is unreachable.
# The location of keybindings is buried deep within subdirectories of the editor.

/usr/bin/dconf-editor

# The explanation follows.
#------------------------
# Start the dconf-editor and follow the schema to /org/gnome/desktop/wm/keybindings/
# In my case I looked for for switch-group
# The value before the change : ['Above_Tab','Above_Tab'] Note that "switch-groups" has two setttings,
# Remove the right most setting ",'Above_Tab'" by deleting from right to left.
# While you are erasing the characters, from right to left, you have a highlight for an error indication
# That highlight will disappear when you erase the comma following the first argument.
# You will note an error indication until you arrive at the first parameter
# Your net result should be ['Above_Tab']

# You have to do the same for the shift-setting

# The backwords setting is next to search for #switch-group-backward
# Remove the ,'Above_Tab'

What you need to review is the control key settings. and restore or enable what was changed.

My fix gives you an idea of what you require to investigate.
The issue about Ctrl key suggests BIOS/firmware related in the laptop as the rest of keyboard works as intended within Gnome Shell session.
I run other operating system like Windows 10 which had the same problem.

Popular posts from this blog

Detailing the installation of AMD OpenCL rpm for Fedora

Revisiting the previous blog and freshly reinstalling Fedora Design Suite due to a busted boot, I look at the official guideline from AMD Driver for Red Hat Enterprise Linux 7.2 and write a way to improve the process of installing on Fedora 29 in this example.



Extracting the tarball contains the following:
amdgpu-installamdgpu-pro-install symlink to amdgpudoc folderrepodata folderRPMS folder containing rpm package
Executing the command ./amdgpu-install -opencl=pal --headless sadly failed on Fedora on that line:

./amdgpu-install -y --opencl=pal --headless
Last metadata expiration check: 0:30:51 ago on Mon 19 Nov 2018 07:13:43 PM PST.
No match for argument: amdgpu

Upon closer look, the script failed to created a temporary repository on /var/opt/amdgpu-pro-local probably explaining why amdgpu metapackage name failed to display. Someone should investigate and provide a fix. At least, we find out Fedora support is available but unofficial.

Due to its design, Gnome Software only allows one cli…

Using AMD RX Vega driver OpenCL on Fedora 29

The Raven Ridge APU is very capable processor to handle OpenCL inside some applications like Blender, Darktable and Gimp. Unfortunately, the current implementation from Mesa, clover, stuck to 1.3, is not supported. AMD released their driver 18.40 with OpenCL2.0+ targeting only Red Hat Enterprise Linux/Cent OS 6.10 and 7.5 in addition of Ubuntu LTS. The good new is the former rpm format can be used on Fedora.

The graphical part of Raven Ridge is Vega 8, basically a cut-down of Vega56 or Vega64 meaning choosing either driver for RX Vega.
The instruction is provided for extracting the rpm files but here is
 some requirements for OpenCL:
kernel-devel (provided by Fedora repository)amdgpu-dkmsdkmslibopencl-amdgpu-proopencl-amdgpu-pro-icd Once done, applications needing OpenCL will automatically detect the driver located on /opt/amdgpu/lib64. Blender will list as unknown AMD GPU and Darktable will enable it.



There is a ROCm version but it currently does not support the graphical side of Rav…

HP, Linux and ACPI

Majority of HP hardware running on Linux and even Microsoft reported an issue related to a non-standard compliant ACPI. Notable message below repeats at least three times on the boot:


4.876549] ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Field [D128] at bit offset/length 128/1024 exceeds size of target Buffer (160 bits) (20190215/dsopcode-198) 
[ 4.876555] ACPI Error: Aborting method \HWMC due to previous error (AE_AML_BUFFER_LIMIT) (20190215/psparse-529) 
[ 4.876562] ACPI Error: Aborting method \_SB.WMID.WMAA due to previous error (AE_AML_BUFFER_LIMIT) (20190215/psparse-529)


The bug is a known for years from which Linux kernel team are unable to fix without the help of vendor i.e. HP. Here is a compilation of reports:
BIOS error: The BIOS in this system is not fully ACPI compliant. ACPI BIOS ERROR (blue screen) on startup ACPI bad works with Linux  The good news is some errors seems harmless. Unfortunately, such errors displayed the quirks approach used by vendors to support …