1. Drivers Bcm Laptops & Desktops Desktop
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laptops-and-netbooks lenovo-g-series-laptops G570 Laptop (Lenovo) G570 Laptop (Lenovo) Product Home; Drivers & Software; Diagnostics; Knowledge Base & Guides. The Broadcom BCM20702A0 chipset is used on a vast amount of laptops, USB Dongle adapters and much more. Hopefully the correct device driver below will fix your issues, and as always backup your system and files before attempting to install any new drivers. Download the latest drivers, firmware, and software for your HP EliteBook 840 G7 Notebook PC.This is HP’s official website that will help automatically detect and download the correct drivers free of cost for your HP Computing and Printing products for Windows and Mac operating system. Search 'bcm' inside synaptic package manager. Mark for installation 'b43-fwcutter', 'firmware-b43-installer' or 'firmware-b43-lpphy-installer'(if you have a broadcom lpphy driver), 'firmware-b43legacy-installer' and apply, no restart needed. Your Wi-Fi led turns on immediately. These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.

The Windows ACPI driver, Acpi.sys, is an inbox component of the Windows operating system. The responsibilities of Acpi.sys include support for power management and Plug and Play (PnP) device enumeration. On hardware platforms that have an ACPI BIOS, the HAL causes Acpi.sys to be loaded during system startup at the base of the device tree. Acpi.sys acts as the interface between the operating system and the ACPI BIOS. Acpi.sys is transparent to the other drivers in the device tree.

Other tasks performed by Acpi.sys on a particular hardware platform might include reprogramming the resources for a COM port or enabling the USB controller for system wake-up.

In this topic

ACPI devices

The hardware platform vendor specifies a hierarchy of ACPI namespaces in the ACPI BIOS to describe the hardware topology of the platform. For more information, see ACPI Namespace Hierarchy.

For each device described in the ACPI namespace hierarchy, the Windows ACPI driver, Acpi.sys, creates either a filter device object (filter DO) or a physical device object (PDO). If the device is integrated into the system board, Acpi.sys creates a filter device object, representing an ACPI bus filter, and attaches it to the device stack immediately above the bus driver (PDO). For other devices described in the ACPI namespace but not on the system board, Acpi.sys creates the PDO. Acpi.sys provides power management and PnP features to the device stack by means of these device objects. For more information, see Device Stacks for an ACPI Device.

A device for which Acpi.sys creates a device object is called an ACPI device. The set of ACPI devices varies from one hardware platform to the next, and depends on the ACPI BIOS and the configuration of the motherboard. Note that Acpi.sys loads an ACPI bus filter only for a device that is described in the ACPI namespace and is permanently connected to the hardware platform (typically, this device is integrated into the core silicon or soldered to the system board). Not all motherboard devices have an ACPI bus filter.

All ACPI functionality is transparent to higher-level drivers. These drivers must make no assumptions about the presence or absence of an ACPI filter in any given device stack.

Acpi.sys and the ACPI BIOS support the basic functions of an ACPI device. To enhance the functionality of an ACPI device, the device vendor can supply a WDM function driver. For more information, see Operation of an ACPI Device Function Driver.

An ACPI device is specified by a definition block in the system description tables in the ACPI BIOS. A device's definition block specifies, among other things, an operation region, which is a contiguous block of device memory that is used to access device data. Only Acpi.sys modifies the data in an operation region. The device's function driver can read the data in an operation region but must not modify the data. When called, an operation region handler transfers bytes in the operation region to and from the data buffer in Acpi.sys. The combined operation of the function driver and Acpi.sys is device-specific and is defined in the ACPI BIOS by the hardware vendor. In general, the function driver and Acpi.sys access particular areas in an operation region to perform device-specific operations and retrieve information. For more information, see Supporting an Operation Region.

ACPI control methods

ACPI control methods are software objects that declare and define simple operations to query and configure ACPI devices. Control methods are stored in the ACPI BIOS and are encoded in a byte-code format called ACPI Machine Language (AML). The control methods for a device are loaded from the system firmware into the device's ACPI namespace in memory, and interpreted by the Windows ACPI driver, Acpi.sys.

To invoke a control method, the kernel-mode driver for an ACPI device initiates an IRP_MJ_DEVICE_CONTROL request, which is handled by Acpi.sys. For drivers loaded on ACPI-enumerated devices, Acpi.sys always implements the physical device object (PDO) in the driver stack. For more information, see Evaluating ACPI Control Methods.

ACPI specification

The Advanced Configuration and Power Interface Specification (ACPI 5.0 specification) is available from the Unified Extensible Firmware Interface Forum website.

Revision 5.0 of the ACPI specification introduces a set of features to support low-power, mobile PCs that are based on System on a Chip (SoC) integrated circuits and that implement the connected standby power model. Starting with Windows 8 and later versions, the Windows ACPI driver, Acpi.sys, supports the new features in the ACPI 5.0 specification. For more information, see Windows ACPI design guide for SoC platforms.

ACPI debugging

System integrators and ACPI device driver developers can use the Microsoft AMLI debugger to debug AML code. Because AML is an interpreted language, AML debugging requires special software tools.

For more information about the AMLI debugger, see ACPI Debugging.

Microsoft ACPI source language (ASL) compiler

For information about compiling ACPI Source Language (ASL) into AML, see Microsoft ASL Compiler.

Version 5.0 of the Microsoft ASL compiler supports features in the ACPI 5.0 specification.

The ASL compiler is distributed with the Windows Driver Kit (WDK).

Drivers Bcm Laptops & Desktops Desktop

The ASL compiler (asl.exe) is located in the ToolsarmACPIVerify, Toolsarm64ACPIVerify, Toolsx86ACPIVerify, and Toolsx64ACPIVerify directories of the installed WDK, for example, C:Program Files (x86)Windows Kits10Toolsx86ACPIVerify.

These chipsets are not natively supported by CentOS.

This page is currently maintained by: Miloš Blažević

Contents

1. Broadcom Corporation BCM4311, BCM4312, BCM4313, BCM4321, BCM4322, BCM43224, BCM43225, BCM43227 and BCM43228 Based Wireless NICs

In order to install Broadcom BCM4311, BCM4312, BCM4313, BCM4321 or BCM4322, BCM43224, BCM43225, BCM43227, or BCM43228 based wireless network cards, the next steps should be followed:

Step 1: Determining WLAN chip and installing dependencies

First of all, make sure you are the 'proud owner of Broadcom BCM43xx wireless card':

After the WLAN chip model was determined, make sure you have no missing packages needed at compile-time and install them if you do:

Of course, if you're compiling the driver for Xen kernel (i.e. kernel-xen), you should install kernel-xen-devel instead of kernel-devel.

Step 2: Downloading and extracting Broadcom driver archive

Download the Broadcom BCM43xx linux driver archive from Broadcom Official website - you'll find it as in the search results list as either Linux® STA 32-bit driver or Linux® STA 64-bit driver - to your machine and extract it to /usr/local/src/hybrid-wl and feel free to change the ownership of the directory and it's contents to some unprivileged user

Step 3a: Compiling the Broadcom driver module (on EL6 and EL7)

Driver module can be compiled as follows:

Mind the quotes (i.e. back quotes).

Now, with the current driver (version 6.30.223.271) it's almost certain you'll get an error message instead of compiled driver module (in fact, different scenario other that this error message is unknown to the author). The message might/will vary depending on the kernel and OS version, but on CentOS 6 it should look something like this:

On EL6, the driver won't compile because of the if-then-else clause for kernel version checking in file wl_cfg80211_hybrid.c. To remedy this, we'll run the following sed replacement commands:

Just these 'sed' replacements are not enough to ensure proper driver compilation. So, we also need to apply the following patch wl-kmod-fix-ioctl-handling.patch prior to actually compiling the driver. Download it to /usr/local/src and run the following command to patch the driver source code:

Now, try compiling the driver module again:

and the compile output should look something like this:

{{{make: Entering directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64' CFG80211 API is prefered for this kernel version Using CFG80211 API

• LD /usr/local/src/hybrid-wl/built-in.o CC [M] /usr/local/src/hybrid-wl/src/shared/linux_osl.o CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_linux.o CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_iw.o CC [M] /usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.o

/usr/local/src/hybrid-wl/src/wl/sys/wl_cfg80211_hybrid.c:1802: warning: initialization from incompatible pointer type

• LD [M] /usr/local/src/hybrid-wl/wl.o Building modules, stage 2.

CFG80211 API is prefered for this kernel version Using CFG80211 API

Drivers BCM Laptops & Desktops

• MODPOST 1 modules CC /usr/local/src/hybrid-wl/wl.mod.o LD [M] /usr/local/src/hybrid-wl/wl.ko.unsigned NO SIGN [M] /usr/local/src/hybrid-wl/wl.ko

make: Leaving directory `/usr/src/kernels/2.6.32-573.7.1.el6.x86_64' }}} The module, once built, can be stripped of unnecessary symbols:

What you will notice, is that driver module file size reduces (from 8.2MB to 7.2MB). And yes, your driver module works

Step 3b: Compiling the Broadcom driver module (specifics required for EL7)

Depending on EL7 point release (or better yet, the kernel version you're running), sub-set of sed replacements to apply will differ. So, stock kernels shipped with EL 7.0 (i.e. kernel-3.10.0-123.X), don't require running any of the commands below, EL 7.1 (i.e. kernel-3.10.0-229.X) require the first two, EL 7.2 (i.e. kernel-3.10.0-327.X), require first four 'sed' commands, EL 7.3 requires first 6 executed, EL7.4 first 7, and for EL 7.5 all 'sed' commands are required so as to make the code compile (along with the one from step 3a):

Again, esp. if you're running EL 7.3, or one of its kernels, you'll have to apply the following patches wl-kmod-01_kernel_4.7_IEEE80211_BAND_to_NL80211_BAND.patchwl-kmod-02_kernel_4.8_add_cfg80211_scan_info_struct.patchwl-kmod-03_fix_kernel_warnings.patchwl-kmod-04_kernel_4.11_remove_last_rx_in_net_device_struct.patchwl-kmod-05_kernel_4.12_add_cfg80211_roam_info_struct.patchBEFORE you apply the above sed replacement commands (otherwise, compilation won't work). Also, don't forget the patch from step 3a:

After applying these to the source code, just follow through the reminder of step 3a - compile the driver, and strip debugging info from it. Again, kernel builds =>229 require first two commands ONLY, builds => 327 require running first four sed replacements, builds >=514 require 6, builds >=693 require 7, and for builds >=862 all sed replacements are needed for driver to compile

Step 4a: Loading the driver module into kernel

Having successfully compiled the driver module, you can now load it into kernel, and eventually set up automatic driver load on system boot (to do all this, you'll have to assume root privileges). Of course, driver module loading can be done only after you remove the existing/conflicting wireless driver modules from kernel (in case these are loaded):

copy the driver module file to a location where kernel can find it:

to be consistent with all other external modules that have been / may be installed from a kmod packages (e.g. fuse, ntfs-3g, etc.)

Next, run:

in order to create a list of module dependencies, and now load the driver module:

Drivers Bcm Laptops & Desktops Refurbished

If no error was reported, the driver module is now successfully loaded and ready to use. The 'ndiswrapper' kernel module can be removed, provided you don't use it for anything else but wireless driver - but this is not necessary.

Step 4b: Loading the driver module into kernel on boot time

Couple of more steps are needed to get your module load every time the system boots. First, edit the /etc/modprobe.d/blacklist.conf file adding the lines:

By doing so, you're preventing these modules from being loaded into kernel at boot time and conflicting with the wl module. Second, in order to load the wl module into the kernel on boot time, create/edit the file /etc/sysconfig/modules/kmod-wl.modules and copy-paste the following contents into it:

Drivers Bcm Laptops & Desktops Best Buy

Your driver should now load every time you reboot (except of course, when you install the new kernel, in which case the driver has to be re-compiled for it following these same steps).

Appendix A: Broadcom chip models tested and reported (by community members) as working

Appendix B: Broadcom chip intermittent problems

This driver module, in author's experience, is sometimes known to require multiple reboots to make the WiFi work. In layman's terms, the WiFi card, finds the AP(s), but fails to associate it with the driver. I've made numerous attempts to make the card/driver work without a reboot, to no avail. Starting/stopping wpa_supplicant service, turning WiFi on/off, (un)loading the driver, ...etc. Sometimes it would only start working after several reboots.

From /var/log/wpa_supplicant.log:

Drivers Bcm Laptops & Desktops Computers

and in /var/log/messages:

Rumour has it, this is caused by 'improper' loading of the WiFi card firmware on boot, hence, only rebooting the system fixes it.

Another problem (probably caused by improperly loaded firmware) is choppy/flaky network connectivity. The cards appears to have associated to the AP, but shows poor signal quality even though you're in the same room with the AP. even pings are dropping, and bottom line - connection is useless. Again, this should be resolved by repeated reboots until the firmware is loaded properly.