DisplayLink Forum - View Single Post - evdi module does not compile with Linux kernel 6.6.8-x

bosurus · 12-25-2023, 12:16 PM

I'm using DisplayLink for Ubuntu V5.8 on Siduction Linux, a rolling Debian distribution.

This worked for me until kernel 6.5.12-1, beside the slow refresh problem, which does not interfere with my slow GUI application on the DisplayLink monitor.

Now with kernel 6.6.8-x, the DisplayLink evdi module fails to compile, so I cant use these kernel versions.

I searched and found, that /var/lib/dkms/evdi/1.14.1/build/make.log tells about missing functions drm_gem_prime_fd_to_handle and drm_gem_prime_handle_to_fd. The header file /usr/src/linux-headers-6.5.0-5-common/include/drm/drm_prime.h contains definitions of these functions, whereas /usr/src/linux-headers-6.6.8-common/include/drm/drm_prime.h does not list these functions anymore.

I'm an occasional programmer, and kernel programming is far above my skills, so I cant tell if this is a bug or a feature.

Please take this information as a warning about future (Ubuntu) kernel versions.

12-25-2023, 12:16 PM	#1
bosurus Junior Member Join Date: Dec 2023 Posts: 1	evdi module does not compile with Linux kernel 6.6.8-x I'm using DisplayLink for Ubuntu V5.8 on Siduction Linux, a rolling Debian distribution. This worked for me until kernel 6.5.12-1, beside the slow refresh problem, which does not interfere with my slow GUI application on the DisplayLink monitor. Now with kernel 6.6.8-x, the DisplayLink evdi module fails to compile, so I cant use these kernel versions. I searched and found, that /var/lib/dkms/evdi/1.14.1/build/make.log tells about missing functions drm_gem_prime_fd_to_handle and drm_gem_prime_handle_to_fd. The header file /usr/src/linux-headers-6.5.0-5-common/include/drm/drm_prime.h contains definitions of these functions, whereas /usr/src/linux-headers-6.6.8-common/include/drm/drm_prime.h does not list these functions anymore. I'm an occasional programmer, and kernel programming is far above my skills, so I cant tell if this is a bug or a feature. Please take this information as a warning about future (Ubuntu) kernel versions.