Bug 88714

Summary: [HSW GT1] wrong size wm entry cause *ERROR* CPU pipe A FIFO underrun
Product: DRI Reporter: dhead666 <myfoolishgames>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: XOrg git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
20150122_fifo.log none

Description dhead666 2015-01-22 17:10:12 UTC
Created attachment 112672 [details]
20150122_fifo.log

I've noticed the error message "*ERROR* uncleared fifo underrun on pipe A" since kernel 3.17, not sure what the best way to reproduce, sometimes it will appear when changing to tty2 and others when the system is stressed (e.g. high GPU usage by Chromium).

See attached log, noticed that I only needed to change to tty2 for the error message appeared.

system: Acer C720, Haswell GT1, 2995U
kernel: 3.19rc5
xf86-video-intel: 2.99.916
mesa: 10.4.2
xorg-server: 1.16.3
distro: Arch Linux x86_64
Comment 1 Rodrigo Vivi 2015-01-22 21:56:57 UTC

*** This bug has been marked as a duplicate of bug 87990 ***

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