Patch for legacy driver 390.132 with Linux-5.5.x

I tried to build the legacy driver 390.132 with Linux kernel 5.5.2 and I get the following errors at the modpost stage:

ERROR: "nvUvmInterfaceSessionCreate" [/tmp/selfgz19699/NVIDIA-Linux-x86_64-390.132/kernel/nvidia-uvm.ko] undefined!
ERROR: "nv_kthread_q_run_self_test" [/tmp/selfgz19699/NVIDIA-Linux-x86_64-390.132/kernel/nvidia-uvm.ko] undefined!
ERROR: "nvUvmInterfacePmaAllocPages" [/tmp/selfgz19699/NVIDIA-Linux-x86_64-390.132/kernel/nvidia-uvm.ko] undefined!
ERROR: "nvUvmInterfaceDupAllocation" [/tmp/selfgz19699/NVIDIA-Linux-x86_64-390.132/kernel/nvidia-uvm.ko] undefined!
ERROR: "nvUvmInterfacePmaUnregisterEvictionCallbacks" [/tmp/selfgz19699/NVIDIA-Linux-x86_64-390.132/kernel/nvidia-u
vm.ko] undefined!
:

and dozens of similar errors. Does anyone have a patch for this driver, please? For clarity, I cannot use the 4xx series of drivers with my GPU.

Thanks.

Edit: I went back and checked again, and do excuse me… I think the heat’s fried the last of my grey matter. This isn’t even remotely related, I think.

What distribution are you running? I’ve gone back and did a quick nm check, and the symbols seem to be exported just fine on my end. Though, I might well have missed something.

For one reason or another, the relevant uvm objects don’t get linked/found in to the kernel module. The functions in that snippet is implemented in “nv_uvm_interface.c”, and linked in nvidia.ko.

I am running opensuse Leap 15.1, but the kernel 5.5.2 is from a their newer repositories. I checked some other distributions and found a patch for Archlinux at https://git.archlinux.org/svntogit/packages.git/plain/trunk/kernel-5.5.patch?h=packages/nvidia-390xx. With a lot of modifications, I got it to build and link successfully. It seems that the main issue was that Linux-5.5 has dropped the “drm/drmP.h” header file. So they had to recreate one called “nv-drm.h” to replace it.

Now, I haven’t tried running the new kernel yet, so I don’t know if the patch will work. I wish the official driver could be patched to reflect these changes.

I have now run the Linux-5.5.2 kernel with the patched nvidia driver. It appears to work, but there is a hidden issue somewhere (which hasn’t crashed my system so far). The kernel logs show the following:

refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 1939 at 0xffffffff89310026
Modules linked in: ... nvidia_drm(PO) nvidia_modeset(PO) nvidia(PO) drm_kms_helper ...
CPU: 0 PID: 1939 Comm: X Tainted: P           O      5.5.2-2.1 #1 openSUSE Leap 15.1
Hardware name: BIOSTAR Group TPower I45/TPower I45, BIOS 080015  09/21/2010
RIP: 0010:0xffffffff89310026
Code: 05 8c af 95 00 01 e8 07 44 d4 ff 0f 0b c3 80 3d 7a af 95 00 00 75 95 48 c7 c7 18>
RSP: 0018:ffffaa33c1a8fd90 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff9178b7c1f5b0 RSI: ffff9178b7c18858 RDI: ffff9178b7c18858
RBP: ffff917881063c28 R08: 0000000000000000 R09: 000000000000035e
R10: 0000000000aaaaaa R11: 00000000ff000000 R12: ffff9178b40072e8
R13: ffff9178b4007000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007f605f59c040(0000) GS:ffff9178b7c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561d61d7a480 CR3: 0000000201218000 CR4: 00000000000006f0
Call Trace:
? 0xffffffffc156bbe7
? 0xffffffffc156910d
? 0xffffffffc0768149
? 0xffffffffc076872a
? 0xffffffffc0768ee9
? 0xffffffffc0769605
? 0xffffffff891bf5e4
? 0xffffffff89073694
? 0xffffffff89001621
? 0xffffffff890019ef
? 0xffffffff8960007c

Perhaps someone might have some insight into this issue?

Patch for Gentoo kernel 5.5.4 and nvidia-drivers-390.132-r1 works there

diff --git a/.manifest b/.manifest
index 56186f6..eec2a5d 100644
--- a/.manifest
+++ b/.manifest
@@ -37,6 +37,7 @@ kernel/nvidia/nv-ibmnpu.c 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:res
 kernel/nvidia/nv-report-err.c 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
 kernel/conftest.sh 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
 kernel/common/inc/nv.h 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
+kernel/common/inc/nv-drm.h 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
 kernel/common/inc/nv-pgprot.h 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
 kernel/common/inc/nv-mm.h 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
 kernel/common/inc/nv-timer.h 0644 KERNEL_MODULE_SRC INHERIT_PATH_DEPTH:1 MODULE:resman
diff --git a/kernel/common/inc/nv-drm.h b/kernel/common/inc/nv-drm.h
new file mode 100644
index 0000000..07e9f3c
--- /dev/null
+++ b/kernel/common/inc/nv-drm.h
@@ -0,0 +1,36 @@
+#ifndef _NV_DRM_H_
+#define _NV_DRM_H_
+
+#include "conftest.h"
+
+#if defined(NV_DRM_DRMP_H_PRESENT)
+#include <drm/drmP.h>
+#else
+#include <linux/agp_backend.h>
+#include <linux/file.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <asm/pgalloc.h>
+#include <linux/uaccess.h>
+
+#include <uapi/drm/drm.h>
+#include <uapi/drm/drm_mode.h>
+
+#include <drm/drm_agpsupport.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_pci.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_sysfs.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_device.h>
+
+#include <drm/drm_gem.h>
+#endif
+
+#endif
diff --git a/kernel/conftest.sh b/kernel/conftest.sh
index c9c2db3..dd22bb0 100755
--- a/kernel/conftest.sh
+++ b/kernel/conftest.sh
@@ -1150,6 +1150,9 @@ compile_test() {
             CODE="
             #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_drv.h>
+            #include <drm/drm_prime.h>
             #endif
             #if !defined(CONFIG_DRM) && !defined(CONFIG_DRM_MODULE)
             #error DRM not enabled
@@ -1781,6 +1784,8 @@ compile_test() {
             echo "$CONFTEST_PREAMBLE
             #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_drv.h>
             #endif
             #include <drm/drm_atomic.h>
             #if !defined(CONFIG_DRM) && !defined(CONFIG_DRM_MODULE)
@@ -1909,7 +1914,11 @@ compile_test() {
             # attached drivers") in v3.14 (2013-12-11)
             #
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_drv.h>
+            #endif
             int conftest_drm_driver_has_legacy_dev_list(void) {
                 return offsetof(struct drm_driver, legacy_dev_list);
             }"
@@ -1933,7 +1942,11 @@ compile_test() {
             #   2017-07-23  e6fc3b68558e4c6d8d160b5daf2511b99afa8814
             #
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_crtc.h>
+            #endif
 
             int conftest_drm_crtc_init_with_planes_has_name_arg(void) {
                 return
@@ -1949,7 +1962,11 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_DRM_CRTC_INIT_WITH_PLANES_HAS_NAME_ARG" "" "types"
 
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_encoder.h>
+            #endif
 
             int conftest_drm_encoder_init_has_name_arg(void) {
                 return
@@ -1964,7 +1981,11 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_DRM_ENCODER_INIT_HAS_NAME_ARG" "" "types"
 
             echo "$CONFTEST_PREAMBLE
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #else
+            #include <drm/drm_plane.h>
+            #endif
 
             int conftest_drm_universal_plane_init_has_format_modifiers_arg(void) {
                 return
@@ -1991,7 +2012,11 @@ compile_test() {
                 echo "#undef NV_DRM_UNIVERSAL_PLANE_INIT_HAS_FORMAT_MODIFIERS_ARG" | append_conftest "types"
 
                 echo "$CONFTEST_PREAMBLE
+                #if defined(NV_DRM_DRMP_H_PRESENT)
                 #include <drm/drmP.h>
+                #else
+                #include <drm/drm_plane.h>
+                #endif
 
                 int conftest_drm_universal_plane_init_has_name_arg(void) {
                     return
@@ -3084,7 +3109,9 @@ compile_test() {
             # drm_framebuffer_{get,put}()") in v4.12 (2017-02-28).
             #
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #endif
             #if defined(NV_DRM_DRM_FRAMEBUFFER_H_PRESENT)
             #include <drm/drm_framebuffer.h>
             #endif
@@ -3103,7 +3130,9 @@ compile_test() {
             # drm_gem_object_{get,put}()") in v4.12 (2017-02-28).
             #
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #endif
             #if defined(NV_DRM_DRM_GEM_H_PRESENT)
             #include <drm/drm_gem.h>
             #endif
@@ -3122,7 +3151,9 @@ compile_test() {
             # functions") in v4.15 (2017-09-26).
             #
             CODE="
+            #if defined(NV_DRM_DRMP_H_PRESENT)
             #include <drm/drmP.h>
+            #endif
             #if defined(NV_DRM_DRM_DRV_H_PRESENT)
             #include <drm/drm_drv.h>
             #endif
diff --git a/kernel/nvidia-drm/nvidia-drm-connector.c b/kernel/nvidia-drm/nvidia-drm-connector.c
index 1553ebc..f851561 100644
--- a/kernel/nvidia-drm/nvidia-drm-connector.c
+++ b/kernel/nvidia-drm/nvidia-drm-connector.c
@@ -20,6 +20,8 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <linux/version.h>
+
 #include "nvidia-drm-conftest.h" /* NV_DRM_ATOMIC_MODESET_AVAILABLE */
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
@@ -71,7 +73,11 @@ static enum drm_connector_status __nv_drm_connector_detect_internal(
     struct nv_drm_encoder *nv_detected_encoder = NULL;
 
     struct NvKmsKapiDynamicDisplayParams *pDetectParams = NULL;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 0)
     unsigned int i;
+#else
+    struct drm_encoder *encoder = NULL;
+#endif
 
     BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));
 
@@ -87,11 +93,16 @@ static enum drm_connector_status __nv_drm_connector_detect_internal(
         goto done;
     }
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 0)
     for (i = 0;
          i < DRM_CONNECTOR_MAX_ENCODER && detected_encoder == NULL; i++) {
         struct drm_encoder *encoder;
+#else
+    drm_connector_for_each_possible_encoder(connector, encoder) {
+#endif
         struct nv_drm_encoder *nv_encoder;
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 0)
         if (connector->encoder_ids[i] == 0) {
             break;
         }
@@ -102,6 +113,7 @@ static enum drm_connector_status __nv_drm_connector_detect_internal(
             BUG_ON(encoder != NULL);
             continue;
         }
+#endif
 
         /*
          * DVI-I connectors can drive both digital and analog
@@ -169,6 +181,8 @@ static enum drm_connector_status __nv_drm_connector_detect_internal(
             }
 
             detected_encoder = encoder;
+
+            break;
         }
     }
 
diff --git a/kernel/nvidia-drm/nvidia-drm-connector.h b/kernel/nvidia-drm/nvidia-drm-connector.h
index f74e22c..099390d 100644
--- a/kernel/nvidia-drm/nvidia-drm-connector.h
+++ b/kernel/nvidia-drm/nvidia-drm-connector.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 #include "nvtypes.h"
 #include "nvkms-api-types.h"
diff --git a/kernel/nvidia-drm/nvidia-drm-crtc.h b/kernel/nvidia-drm/nvidia-drm-crtc.h
index 31ef3b5..5de3a51 100644
--- a/kernel/nvidia-drm/nvidia-drm-crtc.h
+++ b/kernel/nvidia-drm/nvidia-drm-crtc.h
@@ -29,7 +29,7 @@
 
 #include "nvidia-drm-helper.h"
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #include "nvtypes.h"
 #include "nvkms-kapi.h"
 
diff --git a/kernel/nvidia-drm/nvidia-drm-drv.c b/kernel/nvidia-drm/nvidia-drm-drv.c
index a66d3cc..06bf859 100644
--- a/kernel/nvidia-drm/nvidia-drm-drv.c
+++ b/kernel/nvidia-drm/nvidia-drm-drv.c
@@ -39,7 +39,7 @@
 
 #include "nvidia-drm-ioctl.h"
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 /*
  * Commit fcd70cd36b9b ("drm: Split out drm_probe_helper.h")
diff --git a/kernel/nvidia-drm/nvidia-drm-encoder.h b/kernel/nvidia-drm/nvidia-drm-encoder.h
index bbaf986..af341a8 100644
--- a/kernel/nvidia-drm/nvidia-drm-encoder.h
+++ b/kernel/nvidia-drm/nvidia-drm-encoder.h
@@ -32,7 +32,7 @@
 #if defined(NV_DRM_DRM_ENCODER_H_PRESENT)
 #include <drm/drm_encoder.h>
 #else
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #endif
 
 #include "nvkms-kapi.h"
diff --git a/kernel/nvidia-drm/nvidia-drm-fb.h b/kernel/nvidia-drm/nvidia-drm-fb.h
index 7f292ce..d13bc4c 100644
--- a/kernel/nvidia-drm/nvidia-drm-fb.h
+++ b/kernel/nvidia-drm/nvidia-drm-fb.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #include "nvidia-drm-gem-nvkms-memory.h"
 #include "nvkms-kapi.h"
 
diff --git a/kernel/nvidia-drm/nvidia-drm-gem.h b/kernel/nvidia-drm/nvidia-drm-gem.h
index b621969..326f810 100644
--- a/kernel/nvidia-drm/nvidia-drm-gem.h
+++ b/kernel/nvidia-drm/nvidia-drm-gem.h
@@ -29,7 +29,7 @@
 
 #include "nvidia-drm-priv.h"
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #include "nvkms-kapi.h"
 
 #if defined(NV_DRM_DRIVER_HAS_GEM_PRIME_RES_OBJ)
diff --git a/kernel/nvidia-drm/nvidia-drm-helper.c b/kernel/nvidia-drm/nvidia-drm-helper.c
index da602ac..e5d6daa 100644
--- a/kernel/nvidia-drm/nvidia-drm-helper.c
+++ b/kernel/nvidia-drm/nvidia-drm-helper.c
@@ -31,7 +31,7 @@
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #if defined(NV_DRM_DRM_ATOMIC_UAPI_H_PRESENT)
 #include <drm/drm_atomic_uapi.h>
 #endif
diff --git a/kernel/nvidia-drm/nvidia-drm-helper.h b/kernel/nvidia-drm/nvidia-drm-helper.h
index 8f050d8..71c4b90 100644
--- a/kernel/nvidia-drm/nvidia-drm-helper.h
+++ b/kernel/nvidia-drm/nvidia-drm-helper.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 /*
  * drm_dev_put() is added by commit 9a96f55034e41b4e002b767e9218d55f03bdff7d
diff --git a/kernel/nvidia-drm/nvidia-drm-modeset.h b/kernel/nvidia-drm/nvidia-drm-modeset.h
index 06659c5..e9d7b70 100644
--- a/kernel/nvidia-drm/nvidia-drm-modeset.h
+++ b/kernel/nvidia-drm/nvidia-drm-modeset.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 struct drm_atomic_state *nv_drm_atomic_state_alloc(struct drm_device *dev);
 void nv_drm_atomic_state_clear(struct drm_atomic_state *state);
diff --git a/kernel/nvidia-drm/nvidia-drm-os-interface.h b/kernel/nvidia-drm/nvidia-drm-os-interface.h
index f43f851..7f4ff8b 100644
--- a/kernel/nvidia-drm/nvidia-drm-os-interface.h
+++ b/kernel/nvidia-drm/nvidia-drm-os-interface.h
@@ -29,7 +29,7 @@
 
 #if defined(NV_DRM_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 /* Set to true when the atomic modeset feature is enabled. */
 extern bool nv_drm_modeset_module_param;
diff --git a/kernel/nvidia-drm/nvidia-drm-prime-fence.h b/kernel/nvidia-drm/nvidia-drm-prime-fence.h
index 20da923..f3cc2b4 100644
--- a/kernel/nvidia-drm/nvidia-drm-prime-fence.h
+++ b/kernel/nvidia-drm/nvidia-drm-prime-fence.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 #if defined(NV_DRM_DRIVER_HAS_GEM_PRIME_RES_OBJ)
 
diff --git a/kernel/nvidia-drm/nvidia-drm-priv.h b/kernel/nvidia-drm/nvidia-drm-priv.h
index 9076835..77a95f3 100644
--- a/kernel/nvidia-drm/nvidia-drm-priv.h
+++ b/kernel/nvidia-drm/nvidia-drm-priv.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 
 #if defined(NV_DRM_DRM_GEM_H_PRESENT)
 #include <drm/drm_gem.h>
diff --git a/kernel/nvidia-drm/nvidia-drm-utils.h b/kernel/nvidia-drm/nvidia-drm-utils.h
index 6d24120..95190c4 100644
--- a/kernel/nvidia-drm/nvidia-drm-utils.h
+++ b/kernel/nvidia-drm/nvidia-drm-utils.h
@@ -27,7 +27,7 @@
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
 
-#include <drm/drmP.h>
+#include "nv-drm.h"
 #include "nvkms-kapi.h"
 
 struct NvKmsKapiConnectorInfo*

I have applied different versions of this patch, which have different structures but actually end up with the same transformations of the files. Needless to say, they achieve precisely the same results. Just to reiterate, the driver does appear to work but the errors persist in the logs, i.e.

refcount_t: underflow; use-after-free.
:
:

So far, it hasn’t caused any harm. I just wonder what it means?

I confirm I can no more use 390.132 drivers with kernel 5.5 in Fedora. I have to freeze the kernel at 5.4.18. I found some more info here https://bugzilla.rpmfusion.org/show_bug.cgi?id=5536 and here https://ask.fedoraproject.org/t/nvidia-390-drivers-stopped-working-with-kernel-5-5-and-probably-also-nvidia-340/5516

My GeForce GT 730 is not supported by 440xx drivers. The link above say 340xx drivers also may be affected. What are my perspectives if I cannot go to kernel 5.5 and above? I will not be able to upgrade distributive to next version?

Additionally, Nvidia website disinforms about my card. At 440.59 page there are “SUPPORTED PRODUCTS” list, and I see there “GeForce 700 Series” and “GeForce GT 730” there: https://www.nvidia.com/download/driverResults.aspx/156772/en-us

But in fact no! This is a mistake. When I install 440 drivers at “GeForce GT 730”, they say they will “ignore my GPU” and NOT WORKING despite the list say it will work.

In what way has the driver stopped working? As in, you’re unable to compile the driver for 5.5?

As far as I can see, Arch Linux has a package compatible with 5.5. The patch they bundle is the one that “fixes” the missing drmP.h header. Another user on the forums said that PRIME Synchronisation stopped working, and that the one I posted in there apparent got it working again, also on 5.5:
https://bbs.archlinux.org/viewtopic.php?pid=1888542#p1888542

Manjaro apparently got it to compile with 5.5 (and 5.6, I think) as well, though I’m not sure what, if any, patches they used.

The underflow issue was a kernel bug, and got fixed in 5.5.6 if I’m not misremembering.

I don’compile drivers and install “akmod-nvidia-390xx.x86_64” from Fedora repositories. When kernel updated from 5.4.18 to 5.5.5, system went to fallback to Nouveau drivers, loaded GUI with low screen resolution. Only going back to kernel 5.4.18 returned to normal.

Kernel 5.5.6 was published in Fedora repo, I tried it, no luck. Maybe meant kernel 5.6?

I went and looked for the mailing list thread I remembered reading up on it, but can not currently find it. Either I misremembered, or it was somewhere else I got the information from and that was incorrect; or, indeed, it was 5.6 the fix was queued for.

In either case, the issue with actually getting the driver to compile is separate from the non-fatal “refcount_t: underflow; use-after-free”-warning that some people are getting. That’s an issue users of 390xx, 440xx, and possibly other versions as well, are getting. No new kernel release can fix that.

Lastly, I looked at the RPMFusion bug report and saw the current maintainer has dropped the package, so you’re definitely going to have to stay on 5.4 for the foreseeable future – at least, until NVIDIA or someone else patches and packages the driver. I actually gave it a shot myself on a virtual Fedora box, but couldn’t quite get a grip on the RPM packaging system, so that task will have to be something for another better skilled person, I’m afraid.

I now have kernel-5.5.6 (from openSUSE) and I can confirm that that I was able to compile the driver (with patches applied) for this kernel version. It works just the same as in kernel-5.5.2 with the same warnings (refcount_t: underflow …) and all. So the kernel wasn’t fixed and I imagine these warning can be ignored safely.

Just for reference, Nvidia is depreciating several drivers, including 440.33.01, which is the driver used in their CUDA development toolkit. These drivers will no longer work beyond the 5.4 Kernel.

I suppose, I only now have to wish if the NVidia words that latest drivers (not 390) support my card were true.

The page for 440.59 https://www.nvidia.com/download/driverResults.aspx/156772/en-us in “SUPPORTED PRODUCTS” lists “GeForce 700 Series:” and then “GeForce GT 730”

In fact this is false. 440.59 not working with my “GeForce GT 730”.

I see there is newest 440.64 https://www.nvidia.com/Download/driverResults.aspx/157462/en-us which also list my card. I didn’t check it yet (but little hope)

Patch for Fedora akmod-nvidia-390xx-390.132-4.fc31.x86_64 applied and works with kernel 5.5.8-200.fc31.x86_64: https://bugzilla.rpmfusion.org/show_bug.cgi?id=5536