kern/49368: 8(?) pixel artifacts in X, eventual kernel crash

[andrew.cagney%gmail.com@localhost]

>Number:         49368
>Category:       kern
>Synopsis:       8(?) pixel artifacts in X, eventual kernel crash
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 06 14:50:00 +0000 2014
>Originator:     Andrew Cagney
>Release:        7.99.1 NetBSD 7.99.1 (GENERIC) #3: Thu Nov  6 09:01:49 UTC 2014
>Organization:
>Environment:
7.99.1 NetBSD 7.99.1 (GENERIC) #3: Thu Nov  6 09:01:49 UTC 2014 (the UTC is a lie, it is Canada/Eastern)
>Description:
More of a story, clearly things are going in the right direction:

- installed GENERIC.201410252300Z, noticed laptop was only doing 1024x768 but things stable

- updated kernel to a few days ago, noticed laptop now correctly switches to full 720P but:
-- see 8(?) pixel horizontal artifacts being left where things like buttons and icons are being drawn
-- shortly after starting firefox things freeze (should probably find another machine to see if it is pingable)

- updated to kernel to just now
-- tearing still occurring
-- hasn't crashed, yet

-- other info:

running gnome from tip of current pkgsrc branch

Samsung 530U which is pretty standard intel:

cpu0 at mainbus0 apid 0: Intel(R) Core(TM) i5-2467M CPU @ 1.60GHz, id 0x206a7
cpu1 at mainbus0 apid 1: Intel(R) Core(TM) i5-2467M CPU @ 1.60GHz, id 0x206a7
cpu2 at mainbus0 apid 2: Intel(R) Core(TM) i5-2467M CPU @ 1.60GHz, id 0x206a7
cpu3 at mainbus0 apid 3: Intel(R) Core(TM) i5-2467M CPU @ 1.60GHz, id 0x206a7

[    17.081] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 3000
[    17.083] (**) intel(0): Relaxed fencing enabled
[    17.083] (**) intel(0): Wait on SwapBuffers? enabled
[    17.083] (**) intel(0): Triple buffering? enabled
[    17.083] (**) intel(0): Framebuffer tiled
[    17.083] (**) intel(0): Pixmaps tiled
[    17.083] (**) intel(0): 3D buffers tiled
[    17.083] (**) intel(0): SwapBuffers wait enabled
[    17.083] (==) intel(0): video overlay key set to 0x101fe
[    17.084] (II) intel(0): Output LVDS1 has no monitor section
[    17.087] (II) intel(0): Output VGA1 has no monitor section
[    17.090] (II) intel(0): Output HDMI1 has no monitor section
[    17.090] (II) intel(0): Output DP1 has no monitor section
[    17.090] (II) intel(0): EDID for output LVDS1


>How-To-Repeat:

>Fix: