I have been researching the somewhat confused situation regarding NVIDIA driver 620.70.06 and Kernel 7.4-rc (now 7.4-rc2), and this was – to say the least – a bit of a muddle..

One one 7.4-rc system the driver installed and ran successfully with no patches (see https://rglinuxtech.com/?p=3527 ), but on another it failed to compile with several errors..
This makes no sense, but I can only conclude that the byzantine NVIDIA conftest series was confused for some reason?
I found an (apparently) AI-generated patch and this installed OK on another system but failed on a third..

I finally found a combination of extracts from several published patches that did work OK on all these systems..

For NVIDIA-Linux-x86_64-620.70.06/kernel/nvidia-drm/nvidia-drm-drv.c  + = code to be added..

around line 37:
…………….
#include “nvidia-drm-gem-dma-buf.h”
#include “nvidia-drm-utils.h”
#include “nv_dpy_id.h”
+#include <linux/version.h>

around line 64:
…………….
#if defined(NV_DRM_FBDEV_AVAILABLE)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(7, 4, 0)
+#include <drm/clients/drm_fbdev_helper.h>
+#else
#include <drm/drm_fb_helper.h>
#endif
+#endif

around line 2499:
…………..
#if defined(NV_DRM_FBDEV_AVAILABLE)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 4, 0)
drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 1);
#endif
+#endif
drm_mode_config_reset(dev);
} else {
#if defined(NV_DRM_FBDEV_AVAILABLE)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(7, 4, 0)
drm_fb_helper_set_suspend_unlocked(dev->fb_helper, 0);
#endif
+#endif

Note that this is a hack, and will only be an interim solution, until NVIDIA provide an official update..    Usual warnings apply, and do not use in a production environment!

Robert Gadsdon.    November 9th 2026..