Re: kern/49707: i386 i915drmkms on 82845G/GL panic with Xorg intel driver

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

The following reply was made to PR kern/49707; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/49707: i386 i915drmkms on 82845G/GL panic with Xorg intel
 driver
Date: Tue, 18 Oct 2016 17:52:15 -0500 (CDT)

 Now that many updates have been made to the xsrc tree--particularly
 Xorg xserver 1.18.4, I decided to see what impact it had on this PR.
 
 With sources of about 201610181318Z:
 
 NetBSD gx260a 7.99.39 NetBSD 7.99.39 (GX260A) #0: Tue Oct 18 13:17:59 CDT 2016  sysop%dpe2850b.technoskunk.fur@localhost:/d0/build/current/obj/i386/sys/arch/i386/compile/GX260A i386
 
 Starting X incurs a bus error the same as before:
 
 $ X
 
 X.Org X Server 1.18.4
 Release Date: 2016-07-19
 X Protocol Version 11, Revision 0
 Build Operating System: NetBSD/i386  - 
 Current Operating System: NetBSD gx260a 7.99.39 NetBSD 7.99.39 (GX260A) #0: Tue Oct 18 13:17:59 CDT 2016  sysop%dpe2850b.technoskunk.fur@localhost:/d0/build/current/obj/i386/sys/arch/i386/compile/GX260A i386
 Build Date: 14 August 2016  01:29:29AM
  
 Current version of pixman: 0.32.6
         Before reporting problems, check http://wiki.X.Org
         to make sure that you have the latest version.
 Markers: (--) probed, (**) from config file, (==) default setting,
         (++) from command line, (!!) notice, (II) informational,
         (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
 (==) Log file: "/var/log/Xorg.0.log", Time: Tue Oct 18 17:32:01 2016
 (==) Using config file: "/etc/X11/xorg.conf"
 Bus error 
 
 
 Running under 'gdb':
 
 Program received signal SIGBUS, Bus error.
 [Switching to LWP 1]
 0xaac9c3b1 in __kgem_bo_make_scanout (kgem=0xaad9f000, bo=0xaaaa9550, 
     width=1280, height=1024)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/kgem.c:4799
 4799                            *(uint32_t *)bo->map__gtt = 0;
 (gdb) bt
 #0  0xaac9c3b1 in __kgem_bo_make_scanout (kgem=0xaad9f000, bo=0xaaaa9550, 
     width=1280, height=1024)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/kgem.c:4799
 #1  0xaac9d93b in kgem_create_2d (kgem=0xaad9f000, width=1280, height=1024, 
     bpp=32, tiling=1, flags=530)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/kgem.c:5448
 #2  0xaabf6a42 in sna_pixmap_alloc_gpu (sna=0xaad9f000, pixmap=0xaad806a0, 
     priv=0xaadf9e40, flags=16)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/sna_accel.c:1636
 #3  0xaabfba4d in sna_pixmap_move_to_gpu (pixmap=0xaad806a0, flags=322)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/sna_accel.c:4211
 #4  0xaabca09b in sna_pixmap_force_to_gpu (pixmap=0xaad806a0, flags=258)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/sna.h:722
 #5  0xaabca8e3 in sna_create_screen_resources (screen=0xaad20400)
     at /x/current/src/../xsrc/external/mit/xf86-video-intel/dist/src/sna/sna_driver.c:256
 #6  0x00d7018b in xf86CrtcCreateScreenResources (screen=0xaad20400)
     at /x/current/src/../xsrc/external/mit/xorg-server/dist/hw/xfree86/modes/xf86Crtc.c:716
 #7  0x00c94088 in dix_main (argc=1, argv=0xbfb84048, envp=0xbfb84050)
     at /x/current/src/../xsrc/external/mit/xorg-server/dist/dix/main.c:225
 #8  0x00c93d05 in main (argc=1, argv=0xbfb84048, envp=0xbfb84050)
     at /x/current/src/../xsrc/external/mit/xorg-server/dist/dix/stubmain.c:34
 
 
 So, it appears there is no change.
 
 Also, perhaps this PR should be re-categorized from "kern" to "xsrc".
 The original problem of panicking upon starting the X server with the
 "intel" driver seems no-longer to occur.  Instead, we get bus error.
 as noted above and previously.
 
 -- 
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