Bug 89601 - [BSW] Sometimes dmesg shows " *ERROR* EDID checksum is invalid" when connected with HDMI monitor
Summary: [BSW] Sometimes dmesg shows " *ERROR* EDID checksum is invalid" when connecte...
Status: CLOSED DUPLICATE of bug 82551
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-03-17 05:58 UTC by Jeff Zheng
Modified: 2017-10-06 14:30 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg when boot is fine but hot plug shows ERROR (266.93 KB, text/plain)
2015-03-17 05:58 UTC, Jeff Zheng 		no flags Details
dmesg with black screen (185.43 KB, text/plain)
2015-03-17 06:00 UTC, Jeff Zheng 		no flags Details
View All

Description Jeff Zheng 2015-03-17 05:58:24 UTC 
Created attachment 114368 [details]
dmesg when boot is fine but hot plug shows ERROR

==System Environment==
--------------------------
HDMI monitor: ASUS PA238Q
BIOS: V59 
Regression: No. Tried on testing 01-30 and still saw this issue.

Non-working platforms: BSW

==kernel==
--------------------------
-testing: drm-intel-testing-2015-03-13 (fails)

==Bug detailed description==
-----------------------------
When connected ASUS PA238Q monitor with HDMI cable, sometime dmesg shows 
[    2.397263] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is *

Sometimes reboot the system has such error, in this case HDMI monitor is black. "testdisplay -i" may/maynot light the monitor.

When booting system does not show the message, hot plug in/out HDMI cable might also get such error.

==Reproduce steps==
---------------------------- 
1. Connected ASUS PA238Q with HDMI cable and boot
2. Hot plug in/out HDMI cable
3. dmesg
Comment 1 Jeff Zheng 2015-03-17 06:00:02 UTC 
Created attachment 114369 [details]
dmesg with black screen

This dmesg shows ERROR during booting, and HDMI screen is black.
Comment 2 Jeff Zheng 2015-03-17 06:02:28 UTC 
I then tried to reproduce on ASUS VS239HR, and I can reproduce, with less possibility (1/20).
Comment 3 Jeff Zheng 2015-03-31 06:36:56 UTC 
Still saw the ERROR on drm-intel-testing-2015-03-27
Comment 4 Jesse Barnes 2015-03-31 18:23:17 UTC 
Dupe of #82551?  Can you try that patch from that bug and see?
Comment 5 Jeff Zheng 2015-04-01 01:29:54 UTC 
Yes. It looks same. So mark as duplicate. I will verify after 82551 got fixed

*** This bug has been marked as a duplicate of bug 82551 ***
Comment 6 Jeff Zheng 2015-05-11 02:18:41 UTC 
It's very easy when connect to ASUS PA238Q monitor.
Comment 7 Jeff Zheng 2015-05-26 06:44:48 UTC 
Close this one since the same issue is already covered in 82551.
Comment 8 Elizabeth 2017-10-06 14:30:57 UTC 
Closing old verified.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.