linux-kernel - Re: [ERROR] drm:edid; Unexpected error messages in syslog

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Message-Id: <1255065468.3601.24.camel@localhost.localdomain>
Date:	Fri, 09 Oct 2009 13:17:48 +0800
From:	ykzhao <yakui.zhao@...el.com>
To:	Peter Williams <pwil3058@...pond.net.au>
Cc:	Dave Airlie <airlied@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [ERROR] drm:edid;  Unexpected error messages in syslog

On Tue, 2009-10-06 at 14:37 +0800, Peter Williams wrote:
> I've started getting the following messages on recent kernels:
> 
> Oct  5 16:50:40 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:50:40 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:50:40 mudlark kernel:
> Oct  5 16:50:40 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:50:40 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:50:40 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:50:40 mudlark kernel:
> Oct  5 16:50:40 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:50:41 mudlark kernel: [drm] DAC-6: set mode 1600x1200 16
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:50:45 mudlark kernel:
> Oct  5 16:50:45 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:50:45 mudlark kernel:
> Oct  5 16:50:45 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:50:45 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:50:45 mudlark kernel:
> Oct  5 16:50:45 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:51:00 mudlark kernel:
> Oct  5 16:51:00 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:51:00 mudlark kernel:
> Oct  5 16:51:00 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* EDID 
> checksum is invalid, remainder is 16
> Oct  5 16:51:00 mudlark kernel: [drm:edid_is_valid] *ERROR* Raw EDID:
> Oct  5 16:51:00 mudlark kernel:
> Oct  5 16:51:00 mudlark kernel: i915 0000:00:02.0: VGA-1: EDID invalid.
It seems that the EDID obtained from VGA monitor is incorrect.
Will you please open a new bug in
https://bugs.freedesktop.org/

and attach the output of dmesg, vbios.dump?
The vbios.dump can be obtained by using the following commands:
    echo 1 > /sys/devices/pci0000:00/0000:00:02.0/rom
    cat /sys/devices/pci0000:00/0000:00:02.0/rom > vbios.dump
    echo 0 > /sys/devices/pci0000:00/0000:00:02.0/rom

Thanks.
> 
> Should I worry about these?  There's no other noticeable problem with 
> the system.
> 
> Peter

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