en:users:drivers:iwlwifi
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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en:users:drivers:iwlwifi [2016/01/24 07:28] Emmanuel Grumbach Add a note on the 2 weeks 'pending for input' policy |
en:users:drivers:iwlwifi [2016/03/08 07:48] Emmanuel Grumbach [7260 and 7265 support] |
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| ===== Supported Devices ===== | ===== Supported Devices ===== | ||
| The following devices are supported (since kernel version): | The following devices are supported (since kernel version): | ||
| + | * Intel® Wireless 8265 (4.6) | ||
| + | * Intel® Wireless 3168 (4.6) | ||
| * [[http://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/dual-band-wireless-ac-8260-brief.pdf|Intel® Wireless 8260]] (4.1) | * [[http://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/dual-band-wireless-ac-8260-brief.pdf|Intel® Wireless 8260]] (4.1) | ||
| * Intel® Wireless 4165 (4.1) | * Intel® Wireless 4165 (4.1) | ||
| Line 116: | Line 118: | ||
| For bug reports and debugging , please see the [[en:users:drivers:iwlwifi:Debugging|page]] dedicated to that. | For bug reports and debugging , please see the [[en:users:drivers:iwlwifi:Debugging|page]] dedicated to that. | ||
| + | ===== 7260 and 7265 support ===== | ||
| + | 7260 and 7265 will not be supported by the newest firmware versions: the last firmware that was released for these devices is -17.ucode. Bug fixes will be ported to -17.ucode. Note that 7265D can run later firmware versions. In order to determine if your 7265 device is a 'D' version, you can check the dmesg output: | ||
| + | |||
| + | <code> | ||
| + | Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210 | ||
| + | </code> | ||
| + | The revision number of a 7265D device is 0x210, if you see any other number, you have a 7265 device. | ||
| ===== Firmware_class dependency ===== | ===== Firmware_class dependency ===== | ||
| Line 139: | Line 148: | ||
| If you checkout an earlier branch / commit in backport-iwlwifi.git, you might not be able to work against the most recent kernel. Please keep that in mind. | If you checkout an earlier branch / commit in backport-iwlwifi.git, you might not be able to work against the most recent kernel. Please keep that in mind. | ||
| We have a release cycle based on the backport tree. These [[en:users:drivers:iwlwifi:Core_release|Core releases]] can be very useful for someone who wants to integrate our WiFi solution into his home made system. | We have a release cycle based on the backport tree. These [[en:users:drivers:iwlwifi:Core_release|Core releases]] can be very useful for someone who wants to integrate our WiFi solution into his home made system. | ||
| + | |||
| + | ===== About platform noise ===== | ||
| + | |||
| + | WiFi heavily relies on radio frequencies, and those are subject to interference. | ||
| + | Interference may come from another WiFi device, or from many other non-wifi devices (e.g. microwaves) that operates on the same frequency, | ||
| + | and it might also come from other components of your own device/computer – this is known as 'platform noise'. | ||
| + | Platform noise depends on the actual platform/computer and its design/manufacturing, and not on the Intel-wifi module. | ||
| + | |||
| + | Some common sources of platform noise might be: | ||
| + | |||
| + | * The PCIe bus, especially when switching in/out of power saving modes. | ||
| + | * USB3 and graphics (in certain scenarios). | ||
| + | * Sometimes, even the fact that several ingredients’ ground lines are connected can cause noise. | ||
| + | |||
| + | This kind of interference might happen on 2.4GHz band, it is much less likely to happen on 5.2GHz band. | ||
| + | Also note that using 40MHz (and not 20MHz) channel bandwidth will increase the probability to suffer from platform noise (since more frequencies might impact the wifi performance). | ||
| + | |||
| + | Some potential work-around options to this issue: | ||
| + | |||
| + | * Disable wifi's power save (prevent the PCIe link to go to power save): power_scheme=1 module parameter for iwlmvm | ||
| + | * Disable USB3 in BIOS (if possible), it not, just stop using it | ||
| + | * Disable 40MHz on 2.4GHz: cfg80211_disable_40mhz_24ghz module parameter | ||
| + | * Use 5GHz band (on devices that support 5GHz operation) | ||
| + | |||
| + | The fact that one of these options helped doesn't prove that the issue being troubleshooted is 'platform noise', but it may be an indication. | ||
| ===== About iwldvm support and known issues ===== | ===== About iwldvm support and known issues ===== | ||
en/users/drivers/iwlwifi.txt · Last modified: 2023/12/31 12:09 by Miri Korenblit
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