linux-kernel - 2.6.18-rc2: depmod warning for backlight.ko

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Message-Id: <200607172358.07713.mreuther@umich.edu>
Date:	Mon, 17 Jul 2006 23:58:06 -0400
From:	Matt Reuther <mreuther@...ch.edu>
To:	"Antonino A. Daplas" <adaplas@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: 2.6.18-rc2: depmod warning for backlight.ko

Hi, Antonino.

I am still getting warnings on depmod with the 2.6.18-rc2 kernel:

  INSTALL sound/usb/snd-usb-audio.ko
  INSTALL sound/usb/snd-usb-lib.ko
  INSTALL sound/usb/usx2y/snd-usb-usx2y.ko
if [ -r System.map -a -x /sbin/depmod ]; then /sbin/depmod -ae -F System.map  
2.6.18-rc2; fi
WARNING: /lib/modules/2.6.18-rc2/kernel/drivers/video/backlight/backlight.ko 
needs unknown symbol fb_unregister_client
WARNING: /lib/modules/2.6.18-rc2/kernel/drivers/video/backlight/backlight.ko 
needs unknown symbol fb_register_client

You posted a patch here a few days ago for 2.6.18-rc1-mm1 which fixes this 
issue. Basically, the USB Apple Cinema display driver selects backlight 
support, but backlight needs some things from framebuffer, which is turned 
off. Kconfig does not recursively select CONFIG_FB, so backlight ends up with 
unresolved symbols.

Matt
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