Weird ACPI/DRM messages on -current

[Konstantin Belousov]

On Fri, Feb 06, 2015 at 05:10:24PM +0000, Poul-Henning Kamp wrote:
> Thinkpad T430s:
> 
> 11.0-CURRENT #15 r278283: Thu Feb  5 22:45:26 UTC 2015
> 
> Anybody know what this means ?
There is no public documentation about renderer power and clock
management. It seems that NDA'ed doc does not contain it either, but I
am not sure if I am allowed to publically state what NDA doc does not
contain.

> 
> Feb  6 17:05:58 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:06:12 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:06:18 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:06:27 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:06:38 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:07:15 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 00070000, was 19070000
> Feb  6 17:07:37 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 00000000
> Feb  6 17:07:50 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:07:58 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000
> Feb  6 17:08:12 critter kernel: error: [drm:pid1090:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 19070000, was 19000000

These are mostly informational messages, code was taken verbosely from
the Linux kernel.  It seems that later Linux code reorganized code and
get rid of the message.  Some next import will shut down the warnings.