BUG_WARN triggered in os/utils.c, commit 6bf356ef2831baeccd7a650ed3fde0831e33c6c0

[Knut Petersen]

Hi Peter!

During xserver startup a BUG_WARN condition introduced with other code in
commit 6bf356ef2 is mt twice.

System: linux with kernel 3.4.4 running on an AOpen i915GMm-HFS mobo (Pentium M Dothan)


[    97.353] (EE) BUG: triggered 'if (sigio_blocked < 0)'
[    97.376] (EE) BUG: utils.c:1228 in OsReleaseSIGIO()
[    97.381] (EE)
[    97.385] (EE) Backtrace:
[    97.387] (EE) 0: /home/knut/git/X11-u/usr/bin/Xorg (xorg_backtrace+0x38) [0x81e04c8]
[    97.389] (EE) 1: /home/knut/git/X11-u/usr/bin/Xorg (OsReleaseSIGIO+0xaa) [0x81e74fc]
[    97.392] (EE) 2: /home/knut/git/X11-u/usr/bin/Xorg (OsVendorInit+0x39) [0x80c735b]
[    97.394] (EE) 3: /home/knut/git/X11-u/usr/bin/Xorg (OsInit+0x3ca) [0x81e4e55]
[    97.396] (EE) 4: /home/knut/git/X11-u/usr/bin/Xorg (0x8048000+0x1e6b6) [0x80666b6]
[    97.399] (EE) 5: /lib/libc.so.6 (__libc_start_main+0xf3) [0xb709f003]
[    97.401] (EE) 6: /home/knut/git/X11-u/usr/bin/Xorg (0x8048000+0x1e521) [0x8066521]
[    97.403] (EE)
[    97.488]
X.Org X Server 1.12.99
Release Date: 2012-03-14
[    97.499] X Protocol Version 11, Revision 0
[    97.501] Build Operating System: Linux 3.4.4-main i686
[    97.503] Current Operating System: Linux golem 3.4.4-main #48 PREEMPT Fri Jul 13 11:29:03 CEST 2012 i686
[    97.503] Kernel command line: root=/dev/sdb2 acpi_enforce_resources=lax drm.debug=0 3
[    97.508] Build Date: 09 July 2012  03:35:26PM
[    97.510]
[ ..... ]
[    99.868] (II) Loading /home/knut/git/X11-u/usr/lib/xorg/modules/extensions/libdri2.so
[    99.868] (II) Module dri2: vendor="X.Org Foundation"
[    99.868]    compiled for 1.12.99, module version = 1.2.0
[    99.868]    ABI class: X.Org Server Extension, version 6.0
[    99.868] (==) Depth 24 pixmap format is 32 bpp
[    99.868] (II) intel(0): [DRI2] Setup complete
[    99.868] (II) intel(0): [DRI2]   DRI driver: i915
[    99.868] (II) intel(0): Allocated new frame buffer 1280x1024 stride 8192, tiled
[    99.872] (II) UXA(0): Driver registered support for the following operations:
[    99.872] (II)         solid
[    99.872] (II)         copy
[    99.872] (II)         composite (RENDER acceleration)
[    99.872] (II)         put_image
[    99.872] (II)         get_image
[    99.872] (==) intel(0): Backing store disabled
[    99.872] (==) intel(0): Silken mouse enabled
[    99.873] (II) intel(0): Initializing HW Cursor
[    99.873] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[    99.874] (==) intel(0): DPMS enabled
[    99.874] (==) intel(0): Intel XvMC decoder disabled
[    99.874] (II) intel(0): Set up textured video
[    99.874] (II) intel(0): Set up overlay video
[    99.874] (II) intel(0): direct rendering: DRI2 Enabled
[    99.874] (==) intel(0): hotplug detection: "enabled"
[    99.908] (--) RandR disabled
[    99.908] (EE) BUG: triggered 'if (sigio_blocked < 0)'
[    99.908] (EE) BUG: utils.c:1228 in OsReleaseSIGIO()
[    99.909] (EE)
[    99.909] (EE) Backtrace:
[    99.909] (EE) 0: /home/knut/git/X11-u/usr/bin/Xorg (xorg_backtrace+0x38) [0x81e04c8]
[    99.910] (EE) 1: /home/knut/git/X11-u/usr/bin/Xorg (OsReleaseSIGIO+0xaa) [0x81e74fc]
[    99.910] (EE) 2: /home/knut/git/X11-u/usr/bin/Xorg (InitOutput+0x13ba) [0x80c7209]
[    99.910] (EE) 3: /home/knut/git/X11-u/usr/bin/Xorg (0x8048000+0x1e7fb) [0x80667fb]
[    99.911] (EE) 4: /lib/libc.so.6 (__libc_start_main+0xf3) [0xb709f003]
[    99.911] (EE) 5: /home/knut/git/X11-u/usr/bin/Xorg (0x8048000+0x1e521) [0x8066521]
[    99.911] (EE)
[    99.911] (II) Initializing built-in extension Generic Event Extension
[    99.912] (II) Initializing built-in extension SHAPE
[    99.912] (II) Initializing built-in extension MIT-SHM
[    99.912] (II) Initializing built-in extension XInputExtension
[    99.912] (II) Initializing built-in extension XTEST
[    99.912] (II) Initializing built-in extension BIG-REQUESTS
[    99.912] (II) Initializing built-in extension SYNC
[    99.912] (II) Initializing built-in extension XKEYBOARD
[    99.912] (II) Initializing built-in extension XC-MISC
[    99.912] (II) Initializing built-in extension XINERAMA
[    99.912] (II) Initializing built-in extension XFIXES
[    99.912] (II) Initializing built-in extension RENDER
[    99.912] (II) Initializing built-in extension RANDR
[    99.912] (II) Initializing built-in extension COMPOSITE
[    99.912] (II) Initializing built-in extension DAMAGE

cu,
  knut