Re: xsrc/42262: Thinkpad T500 Intel GM45 Express X doesn't like i915drm

[Jeremy Morse <jeremy.morse%gmail.com@localhost>]

The following reply was made to PR xsrc/42262; it has been noted by GNATS.

From: Jeremy Morse <jeremy.morse%gmail.com@localhost>
To: Matthias Pfaller <leo%marco.de@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: xsrc/42262: Thinkpad T500 Intel GM45 Express X doesn't like 
  i915drm
Date: Sun, 10 Jan 2010 17:36:32 +0000

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 Hmn,
 
 When debugging I found all the
 
 [drm:pid0:i915_driver_irq_handler] [drm:pid0:i915_driver_irq_handler]
 iir =3D 0x00000040, pipestats a =3D 0x00020203, b =3D 0x00000000
 
 messages slowed userland to a crawl - it might be worth commenting that
 portion of i915_irq.c (line 218) out. (Plus the output would be easier
 to read).
 
 Otherwise:
 [drm:pid649:i915_wait_irq] [drm:pid649:i915_wait_irq] irq_nr=3D1 breadcru=
 mb=3D0
 and
 [drm:pid649:drm_ioctl] [drm:pid649:drm_ioctl]     returning 35
 
 Suggests this is still the hang experienced before. Yuck.
 
 If you have the time to build xsrc/external/mit/xf86-video-intel
 manually, there's an "intel_statuspage" program built which dumps the
 status page contents. If you could run that and post the output (while X
 is busy hanging, if possible) we can work out whether this is hardware
 not writing to the status page (contents will all be zero), or if it's
 the status page being improperly mapped.
 
 Could you also check that bus-mastering is enabled on the device (pcictl
 /dev/pci0 dump -d <devnum>). According to [0] this recent commit, -5
 xorg doesn't explicitly ensure that it's turned on.
 
 [0] http://mail-index.netbsd.org/source-changes/2010/01/09/msg005178.html=
 
 
 --=20
 Thanks,
 Jeremy
 
 
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