After kernel update to 5.6.0-1007-oem wifi stopped working.
Turned out dkms is unable to build the bcmwl module.
The make log shows:
ubuntu@ubuntu-inspiron-5482:~$ cat /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log
DKMS make.log for bcmwl-6.30.223.271+bdcom for kernel 5.6.0-1007-oem (x86_64)
ons 15 apr 2020 09:19:05 CEST
make: Entering directory '/usr/src/linux-headers-5.6.0-1007-oem'
CFG80211 API is prefered for this kernel version
Using CFG80211 API
AR /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/built-in.a
CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.o
CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.o
CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_iw.o
CC [M] /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.o
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c: In function ‘osl_reg_map’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c:949:10: error: implicit declaration of function ‘ioremap_nocache’; did you mean ‘ioremap_cache’? [-Werror=implicit-function-declaration]
949 | return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
| ^~~~~~~~~~~~~~~
| ioremap_cache
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.c:949:10: warning: returning ‘int’ from a function with return type ‘void *’ makes pointer from integer without a cast [-Wint-conversion]
949 | return (ioremap_nocache((unsigned long)pa, (unsigned long)size));
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.c:40:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.c: In function ‘wl_set_auth_type’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.h:52:5: warning: this statement may fall through [-Wimplicit-fallthrough=]
52 | if (wl_dbg_level & WL_DBG_DBG) { \
| ^
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.c:816:3: note: in expansion of macro ‘WL_DBG’
816 | WL_DBG(("network eap\n"));
| ^~~~~~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_cfg80211_hybrid.c:817:2: note: here
817 | default:
| ^~~~~~~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_attach’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:593:20: error: implicit declaration of function ‘ioremap_nocache’; did you mean ‘ioremap_cache’? [-Werror=implicit-function-declaration]
593 | if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
| ^~~~~~~~~~~~~~~
| ioremap_cache
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:593:18: warning: assignment to ‘void *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
593 | if ((wl->regsva = ioremap_nocache(dev->base_addr, PCI_BAR0_WINSZ)) == NULL) {
| ^
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_pci_probe’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:780:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
780 | if ((val & 0x0000ff00) != 0)
| ^~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:782:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
782 | bar1_size = pci_resource_len(pdev, 2);
| ^~~~~~~~~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:783:15: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
783 | bar1_addr = (uchar *)ioremap_nocache(pci_resource_start(pdev, 2),
| ^
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘wl_reg_proc_entry’:
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:3376:58: error: passing argument 4 of ‘proc_create_data’ from incompatible pointer type [-Werror=incompatible-pointer-types]
3376 | if ((wl->proc_entry = proc_create_data(tmp, 0644, NULL, &wl_fops, wl)) == NULL) {
| ^~~~~~~~
| |
| const struct file_operations *
In file included from /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:38:
./include/linux/proc_fs.h:59:31: note: expected ‘const struct proc_ops *’ but argument is of type ‘const struct file_operations *’
59 | extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
| ^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:275: /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/shared/linux_osl.o] Error 1
make[1]: *** Waiting for unfinished jobs....
In file included from ./include/linux/bitmap.h:9,
from ./include/linux/cpumask.h:12,
from ./arch/x86/include/asm/cpumask.h:5,
from ./arch/x86/include/asm/msr.h:11,
from ./arch/x86/include/asm/processor.h:22,
from ./arch/x86/include/asm/cpufeature.h:5,
from ./arch/x86/include/asm/thread_info.h:53,
from ./include/linux/thread_info.h:38,
from ./arch/x86/include/asm/preempt.h:7,
from ./include/linux/preempt.h:78,
from ./include/linux/spinlock.h:51,
from ./include/linux/seqlock.h:36,
from ./include/linux/time.h:6,
from ./include/linux/stat.h:19,
from ./include/linux/module.h:13,
from /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/include/linuxver.h:40,
from /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:27:
In function ‘strncpy’,
inlined from ‘_wl_add_monitor_if’ at /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c:2980:2:
./include/linux/string.h:284:9: warning: ‘__builtin_strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
284 | return __builtin_strncpy(p, q, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.c: In function ‘_wl_add_monitor_if’:
./include/linux/string.h:305:10: note: length computed here
305 | return __builtin_strlen(p);
| ^~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:275: /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/src/wl/sys/wl_linux.o] Error 1
make: *** [Makefile:1695: /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build] Error 2
make: Leaving directory '/usr/src/linux-headers-5.6.0-1007-oem'
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu5
ProcVersionSignature: Ubuntu 5.6.0-1007.7-oem 5.6.2
Uname: Linux 5.6.0-1007-oem x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 15 09:21:58 2020
InstallationDate: Installed on 2019-12-17 (119 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: bcmwl
UpgradeStatus: No upgrade log present (probably fresh install)
other info:
ubuntu@
bcmwl, 6.30.223.271+bdcom, 5.3.0-26-generic, x86_64: installed
bcmwl, 6.30.223.271+bdcom, 5.3.0-40-generic, x86_64: installed
bcmwl, 6.30.223.271+bdcom, 5.4.0-1002-oem, x86_64: installed
bcmwl, 6.30.223.271+bdcom, 5.4.0-21-generic, x86_64: installedError! Could not locate dkms.conf file.
File: /var/lib/
evdi, 1.6.0+dfsg, 5.4.0-1002-oem, x86_64: built
The hardware is a Dell DW1560.
Tried to reinstall with:
sudo dkms install bcmwl/6.
which gave above output.