Display issue

 It looks like your HP All-in-One PC is freezing under Linux in specific scenarios:


1. When you lock the screen (Win + L).



2. When the screensaver activates after 5 minutes of inactivity.



3. It works fine in presentation mode and Windows.




This suggests a graphics driver or power management issue. Here’s what you can try:


1. Update Graphics Drivers


If your PC has an NVIDIA or AMD GPU, install/update the correct drivers:


For Intel GPUs (default for HP AIO):


sudo apt update && sudo apt upgrade  

sudo apt install xserver-xorg-video-intel


For NVIDIA GPUs:


sudo ubuntu-drivers autoinstall  

reboot



2. Disable Screensaver & Lock Screen


Since the freeze happens when locking or after 5 minutes of inactivity, disable them:


Disable Lock Screen:


gsettings set org.gnome.desktop.screensaver lock-enabled false


Disable Screensaver:


sudo apt remove xscreensaver



3. Change Display Server (Xorg/Wayland)


At the login screen, click your username, then click the settings icon and select "Ubuntu on Xorg" (if using Wayland).


If using Xorg, try switching to Wayland.



4. Check Logs for Errors


After a freeze, check logs for GPU or power issues:


journalctl -p err -b  

dmesg | grep -i error


5. Try a Different Linux Kernel


Older or newer kernels might fix compatibility issues:


Install an older or newer kernel:


sudo apt install linux-generic-hwe-22.04


Replace 22.04 with your Linux version.



Let me know wh

ich Linux distro you're using, and I can give more specific steps!

Yes, you can install an older Linux kernel (or "carnal" as you called it) on your system. Here’s how to do it step by step.



---


1. Check Your Current Kernel Version


Run this command to see your current kernel version:


uname -r



---


2. List Available Older Kernels


For Ubuntu/Debian-based systems:


apt-cache search linux-image


This will list available kernels.



---


3. Install an Older Kernel


Find a stable older version from the list and install it. For example, if you want to install 5.15.0-60, run:


sudo apt install linux-image-5.15.0-60-generic


If you also need the headers:


sudo apt install linux-headers-5.15.0-60-generic


Replace 5.15.0-60 with the version you want.



---


4. Reboot and Select Older Kernel


1. Reboot your system:


sudo reboot



2. When the GRUB boot menu appears, press Esc or Shift (if it doesn’t appear automatically).



3. Select Advanced options for Ubuntu.



4. Choose the older kernel version you installed.





---


5. Make the Older Kernel Default (Optional)


If the older kernel works fine and you want to keep it as default:


sudo grub-set-default "Advanced options for Ubuntu>Ubuntu, with Linux 5.15.0-60-generic"

sudo update-grub


Replace 5.15.0-60-generic with your chosen kernel version.



---


6. Remove Newer (Buggy) Kernel (If Needed)


If the new kernel is causing issues and you want to remove it:


sudo apt remove --purge linux-image-<new-version>

sudo update-grub


Be careful not to remove all kernels, or your system may not boot!

Here's an example of how to remove a newer (buggy) kernel safely:


1. Check Installed Kernels


Run this command to list all installed kernels:


dpkg --list | grep linux-image


You'll see something like this:


ii linux-image-5.15.0-60-generic 5.15.0-60.66~20.04.1 amd64 Signed kernel image generic

ii linux-image-5.19.0-46-generic 5.19.0-46.47~22.04.1 amd64 Signed kernel image generic


Here, 5.19.0-46-generic is the newer version, and 5.15.0-60-generic is the older version.



---


2. Remove the Newer Kernel


If the newer kernel is 5.19.0-46, remove it using:


sudo apt remove --purge linux-image-5.19.0-46-generic

sudo apt remove --purge linux-headers-5.19.0-46-generic


Replace 5.19.0-46-generic with the actual kernel version you want to remove.



---


3. Update GRUB


After removing the kernel, update GRUB to ensure your system boots with the correct kernel:


sudo update-grub



---


4. Reboot Your System


sudo reboot


The system should now boot into the older, stable kernel.



---


Important Notes:


Never remove your currently running kernel (check with uname -r).


Keep at least one older kernel in case something goes wrong.


If the system doesn't boot, use Advanced Options in GRUB to select another kernel manually.



Let me know if

 you need more help!



---


If your system is automatically booting into different kernel versions each time, you need to set a specific kernel as the default in GRUB. Here’s how to do it:



---


1. Check Installed Kernels


Run:


dpkg --list | grep linux-image


Find the stable kernel you want to keep.



---


2. Find GRUB Menu Entry for Your Kernel


Run:


grep menuentry /boot/grub/grub.cfg


This will show all available boot entries. Look for something like:


menuentry 'Ubuntu, with Linux 5.15.0-60-generic' --class ubuntu --class gnu-linux


Note the exact kernel version (e.g., 5.15.0-60-generic).



---


3. Set Default Kernel in GRUB


Now, set the stable kernel as the default boot option:


sudo grub-set-default "Advanced options for Ubuntu>Ubuntu, with Linux 5.15.0-60-generic"


Then update GRUB:


sudo update-grub



---


4. Verify & Reboot


Check if the setting applied correctly:


sudo grub-editenv list


It should show something like:


saved_entry=Advanced options for Ubuntu>Ubuntu, with Linux 5.15.0-60-generic


Now reboot:


sudo reboot


Your system should always boot into the selected kernel by default.



---


Optional: Remove Unwanted Kernels


If you want to completely remove unstable kernels to prevent issues:


sudo apt remove --purge linux-image-5.19.0-46-generic

sudo apt remove --purge linux-headers-5.1

9.0-46-generic

sudo update-grub


Let me know if you need more help!

sudo apt install linux-image-5.15.0-60-generic

In Linux, kernel images and kernel headers serve different purposes but work together to ensure smooth operation of the system. Here's what they are and why they are needed:



---


1. Kernel Image (linux-image-<version>):


The kernel image is the actual Linux kernel—the core part of the operating system that interacts with hardware. It includes:


The Linux kernel itself (code that runs the system).


Device drivers for hardware like Wi-Fi, USB, graphics, etc.


Core system functionality (memory management, process scheduling, etc.).



Why install it?


The system won't boot without it because the kernel is required to start the OS.


Different versions exist to provide updates, bug fixes, and security patches.



Example installation:


sudo apt install linux-image-5.15.0-60-generic



---


2. Kernel Headers (linux-headers-<version>):


The kernel headers are the development files needed to compile kernel modules and drivers. They include:


C header files that define system calls and kernel functions.


Interfaces for compiling third-party drivers (e.g., NVIDIA, VirtualBox, Wi-Fi adapters).



Why install it?


Required for compiling external drivers (like NVIDIA graphics, VirtualBox, or Wi-Fi drivers).


Needed if you’re developing or modifying kernel modules.



Example installation:


sudo apt install linux-headers-5.15.0-60-generic



---


When Do You Need Both?


If you're just running Linux, the kernel image is enough.


If you're installing drivers or developing kernel modules, you need both the image and headers.




---


Checking Installed Kernel and Headers


To check the currently running kernel version:


uname -r


To check if kernel headers are installed:



dpkg -l | grep linux-headers


Let me know if you need more details!

You can check the installed kernel image on your Linux system using the following commands:


1. Check the Currently Running Kernel Image


Run:


uname -r


This will show the version of the kernel currently running, e.g.:


5.15.0-60-generic



---


2. List All Installed Kernel Images


To see all installed kernel images:


dpkg --list | grep linux-image


Example output:


ii linux-image-5.15.0-60-generic 5.15.0-60.66~20.04.1 amd64 Signed kernel image generic

ii linux-image-5.19.0-46-generic 5.19.0-46.47~22.04.1 amd64 Signed kernel image generic


This shows all installed kernel versions.



---


3. Check Kernel Image Files in /boot


Run:


ls /boot/vmlinuz-*


This lists all kernel images available for booting. Example output:


/boot/vmlinuz-5.15.0-60-generic  

/boot/vmlinuz-5.19.0-46-generic



---


4. Check Which Kernel Will Boot by Default


Run:


sudo grub-editenv list


If a kernel is saved as the default, it will show:


saved_entry=Advanced options for Ubuntu>Ubuntu, with Linux 5.15.0-60-generic


If not, the latest installed kernel will boot automatically.


Let me know if you n

eed further details!

journalctl -k -b -1 | grep -iE "error|fail|freeze|hung|panic"

journalctl -xe | grep -iE "error|fail|timeout"


cat ~/.local/share/xorg/Xorg.0.log | grep -iE "EE|WW" ,,( gui)

dmesg -T | grep -iE "error|fail|hang|timeout|reset" ( hardware to karnal )

journalctl --boot=-1 --priority=err ( previous issue boot )

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