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Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m for Intel Arc Pro B-series (Battlemage) support

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Hi Justin,

On Sat, May 09, 2026 at 05:56:05PM -0700, Justin Baker wrote:
> Source: linux
> Severity: normal
> X-Debbugs-Cc: me@jbaker.dev
> 
> Dear Maintainer,
> 
> Issue:
> 
> The Intel Arc Pro B60 (Battlemage, device 8086:e211) has some issues with fan
> control. After the system has been running for a while, the fans
> spin up and do not spin back down.
> 
> The driver logs show:
> 
>   xe 0000:04:00.0: [drm] Can't init xe mei late bind missing mei component
> 
> The fan control version shows as:
> 
>   $ cat /sys/bus/pci/drivers/xe/0000:04:00.0/lb_fan_control_version
>   0.0.0.0
> 
> Root cause(my working theory):
> 
> The xe driver requires CONFIG_INTEL_MEI_LB to communicate with the load board
> microcontroller that manages fan control and voltage regulation. This option
> was added in Linux 6.19 but is currently disabled in Debian's kernel config:
> 
>   $ grep INTEL_MEI_LB /boot/config-$(uname -r)
>   # CONFIG_INTEL_MEI_LB is not set
> 
> Setting CONFIG_INTEL_MEI_LB=m should allow the xe driver to initialize the
> load board via the MEI interface at runtime, enabling proper fan control and
> voltage regulation without requiring firmware flashing or a reboot.
> 
> This is similar to bug #1028463 which added CONFIG_INTEL_MEI_GSC for Intel
> Arc A-series support.
> 
> Please also consider backporting to trixie-backports, as this affects users
> running the current stable release with backports kernel.

Can you confirm that after enabling the config option your device is
properly working?

Regards,
Salvatore

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Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m for Intel Arc Pro B-series (Battlemage) support Justin Baker <me@jbaker.dev> - 2026-05-10 03:00 +0200
  Processed: Re: Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m  for Intel Arc Pro B-series (Battlemage) support "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-10 10:10 +0200
  Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m for Intel Arc Pro B-series (Battlemage) support Salvatore Bonaccorso <carnil@debian.org> - 2026-05-10 10:10 +0200
  Processed: Re: Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m  for Intel Arc Pro B-series (Battlemage) support "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-14 11:10 +0200
  Bug#1136132: linux: Please enable CONFIG_INTEL_MEI_LB=m for Intel Arc Pro B-series (Battlemage) support Salvatore Bonaccorso <carnil@debian.org> - 2026-05-14 11:10 +0200

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