Compiling a custom kernel for 15khz/interlaced support: Difference between revisions

Revision as of 03:17, 9 September 2026

= Building Linux 7.2.2 with AMDGPU Interlaced Support (RX 6600 XT / DCN)

This guide applies only the necessary patch for interlaced modes on modern AMDGPU (DCN2/DCN3/DCN4), such as the RX 6600 XT.

1. Download Kernel Source

 cd ~
 wget https://cdn.kernel.org/pub/linux/kernel/v7.x/linux-7.2.2.tar.xz
 tar -xf linux-7.2.2.tar.xz
 cd linux-7.2.2

2. Download the Interlaced Patch

 wget https://raw.githubusercontent.com/D0023R/linux_kernel_15khz/master/linux-7.2/03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch

3. Apply the Patch

 patch -p1 < 03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch

4. Configure the Kernel

 cp /boot/config-$(uname -r) .config
 make olddefconfig

(Optional) Add a custom version string:

 scripts/config --set-str LOCALVERSION "-interlace"

5. Build

 make -j$(nproc)

Or create Debian packages:

 make -j$(nproc) bindeb-pkg

6. Install

 sudo make modules_install
 sudo make install

Or with packages:

 sudo dpkg -i ../linux-image-*.deb ../linux-headers-*.deb

Update bootloader:

 sudo update-initramfs -u
 sudo update-grub

Reboot and select the new kernel.

Notes

This patch enables interlace_allowed on AMDGPU DCN connectors and removes the temporary interlacing block.
No 15 kHz / low-dotclock modes are added.
After reboot, test interlaced modes with xrandr or your preferred tool.

@@ Line 5: / Line 5: @@
 == 1. Download Kernel Source ==
-<syntaxhighlight lang="bash">
+  cd ~
-cd ~
+  wget https://cdn.kernel.org/pub/linux/kernel/v7.x/linux-7.2.2.tar.xz
-wget https://cdn.kernel.org/pub/linux/kernel/v7.x/linux-7.2.2.tar.xz
+  tar -xf linux-7.2.2.tar.xz
-tar -xf linux-7.2.2.tar.xz
+  cd linux-7.2.2
-cd linux-7.2.2
-</syntaxhighlight>
 == 2. Download the Interlaced Patch ==
-<syntaxhighlight lang="bash">
+  wget https://raw.githubusercontent.com/D0023R/linux_kernel_15khz/master/linux-7.2/03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch
-wget https://raw.githubusercontent.com/D0023R/linux_kernel_15khz/master/linux-7.2/03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch
-</syntaxhighlight>
 == 3. Apply the Patch ==
-<syntaxhighlight lang="bash">
+  patch -p1 < 03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch
-patch -p1 < 03_linux_15khz_dcn1_dcn2_dcn3_dcn4_interlaced_mode_fix.patch
-</syntaxhighlight>
 == 4. Configure the Kernel ==
-<syntaxhighlight lang="bash">
+  cp /boot/config-$(uname -r) .config
-cp /boot/config-$(uname -r) .config
+  make olddefconfig
-make olddefconfig
-</syntaxhighlight>
 (Optional) Add a custom version string:
-<syntaxhighlight lang="bash">
+  scripts/config --set-str LOCALVERSION "-interlace"
-scripts/config --set-str LOCALVERSION "-interlace"
-</syntaxhighlight>
 == 5. Build ==
-<syntaxhighlight lang="bash">
+  make -j$(nproc)
-make -j$(nproc)
-</syntaxhighlight>
 Or create Debian packages:
-<syntaxhighlight lang="bash">
+  make -j$(nproc) bindeb-pkg
-make -j$(nproc) bindeb-pkg
-</syntaxhighlight>
 == 6. Install ==
-<syntaxhighlight lang="bash">
+  sudo make modules_install
-sudo make modules_install
+  sudo make install
-sudo make install
-</syntaxhighlight>
 Or with packages:
-<syntaxhighlight lang="bash">
+  sudo dpkg -i ../linux-image-*.deb ../linux-headers-*.deb
-sudo dpkg -i ../linux-image-*.deb ../linux-headers-*.deb
-</syntaxhighlight>
 Update bootloader:
-<syntaxhighlight lang="bash">
+  sudo update-initramfs -u
-sudo update-initramfs -u
+  sudo update-grub
-sudo update-grub
-</syntaxhighlight>
 Reboot and select the new kernel.