Bug 87580 - [BYT] testdisplay does not show every resolution on HDMI display
Summary: [BYT] testdisplay does not show every resolution on HDMI display
Status: CLOSED FIXED
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: 2014-12-22 08:04 UTC by Jeff Zheng
Modified: 2015-04-03 07:45 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg (294.03 KB, text/plain)
2014-12-22 08:04 UTC, Jeff Zheng 		no flags Details
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Description Jeff Zheng 2014-12-22 08:04:35 UTC 
Created attachment 111148 [details]
dmesg

==System Environment==
--------------------------
I fail to find a good commit. 

Non-working platforms: Baytrail (test machine: x-bytm02)
Working platforms: Braswell, Pinetrail


==kernel==
--------------------------
3.18.0 commit b2776bf7149bddd1f4161f14f79520f17fc1d71d

==Bug detailed description==
-----------------------------
Monitor Manufacturer: ACER HS244HQ

[BYT] testdisplay does not show every resolution on HDMI display. Only ~5 resolutions show normally in total 34 resolutions. The display is blank for most resolutions, there are several resolutions on which the display is flashing.


==Reproduce steps==
---------------------------- 
1. ./testdisplay -a
2. check HDMI display.
Comment 1 Jeff Zheng 2014-12-23 07:25:41 UTC 
Regression: No. I tried 2014 Q3 release commit 62de88e8e65811010deac5375f8f0d8b14dc4d94 and saw the same issue.
Comment 2 Ding Heng 2014-12-29 08:27:39 UTC 
(In reply to Jeff Zheng from comment #1)
> Regression: No. I tried 2014 Q3 release commit
> 62de88e8e65811010deac5375f8f0d8b14dc4d94 and saw the same issue.

I tested with b2776bf7149bddd1f4161f14f79520f17fc1d71d
Find out this issue will only occurs when ACER HS244HQ was connected.ViewSonic VS14703 and ASUS PA238Q will work fine.
Comment 3 Jesse Barnes 2015-04-02 18:02:56 UTC 
Which modes fail?  Do those modes work if you specifiy them manually with testdisplay?
Comment 4 Jeff Zheng 2015-04-03 07:44:45 UTC 
Tried on ASUS PA238Q on drm-intel-testing-2015-03-27 and it worked fine. Since ACER HS244HQ is not available now, I'd prefer to close this bug.

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