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

[Matthias Pfaller <leo%marco.de@localhost>]

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

From: Matthias Pfaller <leo%marco.de@localhost>
To: Jeremy Morse <jeremy.morse%gmail.com@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: xsrc/42262: Thinkpad T500 Intel GM45 Express X doesn't like 
  i915drm
Date: Mon, 11 Jan 2010 22:21:54 +0100

 Jeremy Morse wrote:
 > Hmn,
 >
 > When debugging I found all the
 >
 > [drm:pid0:i915_driver_irq_handler] [drm:pid0:i915_driver_irq_handler]
 > iir = 0x00000040, pipestats a = 0x00020203, b = 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=1 breadcrumb=0
 > 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
 >
 >   
 Ok, so I started compiling pkgsrc/sysutils/libpciaccess, interrupted, 
 droped in our xsrc/external/libpciaccess/dist/src/netbsd_pci.c, 
 restarted compiling and did a "make replace".
 Now that X is running with drm I just need to file a bugreport for 
 pkgsrc/sysutils/libpciaccess...
 
 Thank's for all the help, Matthias