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 for <freebsd-current@freebsd.org>; Tue, 10 Nov 2015 09:26:14 -0500 (EST)
Subject: Re: VM errors on -current
To: freebsd-current@freebsd.org
References: <563D4DA7.5030508@protected-networks.net>
 <563D4E26.7020705@freebsd.org> <563D5088.3070408@protected-networks.net>
From: Michael Butler <imb@protected-networks.net>
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Date: Tue, 10 Nov 2015 09:26:13 -0500
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On 11/06/15 20:14, Michael Butler wrote:
> On 11/06/15 20:04, Allan Jude wrote:
>> On 2015-11-06 20:02, Michael Butler wrote:
>>> Is anyone else seeing VM errors from X on -current with an old Intel
>>> display adapter?
>>>
>>> agp0: <Intel 82945GM (945GM GMCH) SVGA controller> on vgapci0
>>> agp0: aperture size is 256M, detected 7932k stolen memory
>>>
>>>  [ .. snip .. ]
>>>
>>> kernel: vm_fault: pager read error, pid 1103 (Xorg) <----- ??
>>> kdm[993]: X server for display :0 terminated unexpectedly
>>> kernel: pid 1103 (Xorg), uid 0: exited on signal 6 (core dumped)
>>> devd: notify_clients: send() failed; dropping unresponsive client
>>>
>>> 	imb
>>>
>>> _______________________________________________
>>> freebsd-current@freebsd.org mailing list
>>> https://lists.freebsd.org/mailman/listinfo/freebsd-current
>>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
>>>
>>
>> That pager error may suggest a failing disk where it was unable to read
>> back some swapped out data. Check /var/log/messages for disk errors
> 
> No swap in use - this is a video-RAM paging issue,

As it turns out, this is a problem with the SNA acceleration method on
this device (likely a bug in the i915 video driver). Flipping to UXA
works perfectly with KDE and compositing,

	imb