Bug 37032 - DRM_RADEON=m with CONFIG_FB=y fails
Summary: DRM_RADEON=m with CONFIG_FB=y fails
Status: RESOLVED OBSOLETE
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-06-09 05:40 UTC by Dan Weeks
Modified: 2012-08-24 14:34 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.39
Subsystem:
Regression: No
Bisected commit-id:

Attachments
Working 2.6.39 config (73.70 KB, application/octet-stream)
2011-06-09 05:40 UTC, Dan Weeks 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Dan Weeks 2011-06-09 05:40:22 UTC 
Created attachment 61312 [details]
Working 2.6.39 config

The summary pretty much says it all. Linking barfed due to some Radeon DRM + backlight issue. From what I've read, similar issues have cropped up before but I have yet been able to find the root cause. I can say the problem did go away when I changed my config from CONFIG_FB=y to CONFIG_FB=m. I've attached my working config and the linking error is below.

drivers/built-in.o: In function `radeon_lvds_enc_destroy': radeon_legacy_encoders.c:(.text+0x958ce): undefined reference to `backlight_device_unregister'
drivers/built-in.o: In function `radeon_legacy_backlight_init': (.text+0x95a4c): undefined reference to `backlight_device_register'
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