Bug 85951

Summary:	[hsw] [drm:drm_edid_block_valid] ERROR EDID checksum is invalid, remainder is 46
Product:	Drivers	Reporter:	Cristian Aravena Romero (caravena)
Component:	Video(DRI - Intel)	Assignee:	intel-gfx-bugs (intel-gfx-bugs)
Status:	RESOLVED UNREPRODUCIBLE
Severity:	normal	CC:	intel-gfx-bugs
Priority:	P3
Hardware:	All
OS:	Linux
Kernel Version:	3.16.4	Subsystem:
Regression:	No	Bisected commit-id:

Description Cristian Aravena Romero 2014-10-09 07:46:24 UTC

Open bug in lauchpad.net
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1379206

[65718.575763] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 46
[65718.575771] Raw EDID:
[65718.575775] 00 ff ff ff ff ff ff 00 1e 6d 01 00 01 01 01 01
[65718.575778] 01 14 01 03 80 10 09 78 0a ee 91 a3 54 4c 99 26
[65718.575781] 0f 50 54 a1 08 00 81 80 61 40 45 40 31 40 01 01
[65718.575783] 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
[65718.575786] 45 00 a0 5a 00 00 7f ff ff ff ff ff ff ff ff ff
[65718.575788] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[65718.575791] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[65718.575793] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Comment 1 Jani Nikula 2015-01-28 14:40:07 UTC

We seem to have neglected this bug, apologies.

Please set drm.debug=14 module parameter and attach dmesg all the way from boot to the problem. Thanks.

Comment 2 Cristian Aravena Romero 2015-02-09 09:35:36 UTC

Example in Ubuntu of "drm.debug=14 module parameter"?

Comment 3 Cristian Aravena Romero 2015-02-09 09:53:12 UTC

?
============================
$ sudo vi /etc/modules

# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Parameters can be specified after the module name.

options i915 drm.debug=14
============================

Comment 4 Jani Nikula 2015-02-09 11:04:40 UTC

(In reply to Cristian Aravena Romero from comment #3)
> options i915 drm.debug=14

Except in this case "drm" is the module and "debug" is the parameter, i.e. you'll need:

options drm debug=14

However, if you don't want to set this permanently, you can edit the parameters passed on the kernel command line at boot in the boot loader. For example, in grub you hit 'e' to edit the boot entry, and you can add "drm.debug=14" in the linux boot line. HTH.

Comment 5 Cristian Aravena Romero 2015-02-09 13:15:15 UTC

Hello Jani,

Not problem of "[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid," in kernel 3.19-rc7.

I created report for https://bugzilla.kernel.org/show_bug.cgi?id=79261#c16 with you comment.

Many Thanks.
--
Cristian

Comment 6 Jani Nikula 2015-02-09 13:30:30 UTC

(In reply to Cristian Aravena Romero from comment #5)
> Not problem of "[drm:drm_edid_block_valid] *ERROR* EDID checksum is
> invalid," in kernel 3.19-rc7.

Can we close this bug then?

Comment 7 Cristian Aravena Romero 2015-02-09 13:44:18 UTC

Hello Jani,

Yes! :)

Thanks for you work.
--
Cristian

Comment 8 Jani Nikula 2015-02-09 13:50:03 UTC

Thanks for the report anyway, please do reopen or file new bugs if the problem persists.