Bug 93728 - [byt-m edp] Fuzzy display with i915 via eDP
Summary: [byt-m edp] Fuzzy display with i915 via eDP
Status: CLOSED INVALID
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL: https://bugzilla.kernel.org/show_bug....
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-01-15 13:09 UTC by Jani Nikula
Modified: 2017-07-24 22:43 UTC (History)
1 user (show)

See Also:
i915 platform: BYT
i915 features: display/eDP

Attachments

Description Jani Nikula 2016-01-15 13:09:52 UTC 
Moving from https://bugzilla.kernel.org/show_bug.cgi?id=89251

I have a small panel PC with Intel BayTrail-M chipset. Once the i915 driver is loaded, the display (internally connected via eDP) shows every second pixel line shifted one pixel to the right, which leads to "fuzzy" graphics. Booting with "nomodeset" avoids the problem (see attachment). I tested with 3.16, 3.17 and 3.18 (problem persists).

PC: http://www.winmate.com.tw/TabletPC/TabletPCSpec.asp?Prod=13_0184
lspci output: 00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0c)

...

Problem persists with 4.2.5, unfortunately.
Comment 1 Jani Nikula 2016-01-15 13:13:33 UTC 
Photo with/without nomodeset: https://bugzilla.kernel.org/attachment.cgi?id=159711

Dmesg running 4.2.5: https://bugzilla.kernel.org/attachment.cgi?id=191561
Comment 2 Jani Nikula 2016-10-31 15:04:53 UTC 
Seems fair to say we didn't figure this out. Timeout, closing. Please reopen if the problem persists with current kernels.

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