About once in a week the X server is crashing at a system with a GeForce GT 520 due to segmentation fault, see also Gentoo bug at https://bugs.gentoo.org/show_bug.cgi?id=437282. I tried to debug the xorg-drivers corresponding http://www.x.org/wiki/Development/Documentation/ServerDebugging, i.e. I recompiled xf86-video-nouveau xf86-video-modesetting xorg-drivers xorg-server xorg-x11 with the debugging option (CFLAGS="-march=native -O2 -ggdb"). I attached the debugger to /usr/bin/Xorg and got the following output: root@leopard:/root(4)# gdb /usr/bin/Xorg $(pidof Xorg) GNU gdb (Gentoo 7.5 p1) 7.5 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: <http://bugs.gentoo.org/>... Reading symbols from /usr/bin/Xorg...done. Attaching to program: /usr/bin/Xorg, process 7210 warning: Could not load shared library symbols for linux-vdso.so.1. Do you need "set solib-search-path" or "set sysroot"? Reading symbols from /usr/lib64/libudev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libudev.so.1 Reading symbols from /usr/lib64/libgcrypt.so.11...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libgcrypt.so.11 Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /usr/lib64/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libpciaccess.so.0 Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [New LWP 7283] [New LWP 7282] [New LWP 7281] [New LWP 7280] [New LWP 7279] [New LWP 7278] [New LWP 7277] [New LWP 7276] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Loaded symbols for /lib64/libpthread.so.0 Reading symbols from /usr/lib64/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libdrm.so.2 Reading symbols from /usr/lib64/libpixman-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libpixman-1.so.0 Reading symbols from /usr/lib64/libXfont.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXfont.so.1 ... Reading symbols from /usr/lib64/xorg/modules/extensions/libglx.so...done. Loaded symbols for /usr/lib64/xorg/modules/extensions/libglx.so Reading symbols from /usr/lib64/xorg/modules/drivers/nouveau_drv.so...done. Loaded symbols for /usr/lib64/xorg/modules/drivers/nouveau_drv.so Reading symbols from /usr/lib64/libdrm_nouveau.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libdrm_nouveau.so.2 Reading symbols from /usr/lib64/xorg/modules/libfb.so...done. Loaded symbols for /usr/lib64/xorg/modules/libfb.so Reading symbols from /usr/lib64/xorg/modules/libexa.so...done. Loaded symbols for /usr/lib64/xorg/modules/libexa.so Reading symbols from /usr/lib64/xorg/modules/libshadowfb.so...done. Loaded symbols for /usr/lib64/xorg/modules/libshadowfb.so Reading symbols from /usr/lib64/dri/swrast_dri.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/dri/swrast_dri.so ... Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libnss_files.so.2 0x00007f1f92f4a0e3 in select () from /lib64/libc.so.6 (gdb) cont Continuing. After one day of working I see in the debugger window: ... (gdb) cont Continuing. Program received signal SIGSEGV, Segmentation fault. NVRefreshArea (pScrn=0x10c4420, num=<optimized out>, pbox=<optimized out>) at /usr/include/bits/string3.h:52 52 return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest)); (gdb) bt f #0 NVRefreshArea (pScrn=0x10c4420, num=<optimized out>, pbox=<optimized out>) at /usr/include/bits/string3.h:52 pNv = 0x10c49a0 x1 = <optimized out> y1 = <optimized out> x2 = <optimized out> y2 = <optimized out> width = 1340 height = <optimized out> cpp = 4 FBPitch = 7680 max_height = 1211 src = <optimized out> dst = <optimized out> \#1 0x00007f1f91019f5a in ShadowCopyArea (pSrc=0x3c39750, pDst=0x3f65130, pGC=0x14fe0b0, srcx=<optimized out>, srcy=<optimized out>, width=<optimized out>, height=75, dstx=0, dsty=0) at /var/tmp/portage/x11-base/xorg-server-1.13.0/work/xorg-server-1.13.0/hw/xfree86/shadowfb/shadow.c:618 ret = <optimized out> box = {x1 = 1585, y1 = 1136, x2 = 2225, y2 = 1211} boxNotEmpty = 1 pPriv = 0x10cd450 pGCPriv = 0x14fe160 oldFuncs = 0x7f1f9121e1c0 <ShadowGCFuncs> #2 0x0000000000436f43 in ProcCopyArea (client=0x147b480) at /var/tmp/portage/x11-base/xorg-server-1.13.0/work/xorg-server-1.13.0/dix/dispatch.c:1622 pDst = 0x3f65130 pSrc = 0x3c39750 pGC = 0x14fe0b0 stuff = 0x3f416d8 pRgn = <optimized out> rc = <optimized out> #3 0x000000000043aee1 in Dispatch () at /var/tmp/portage/x11-base/xorg-server-1.13.0/work/xorg-server-1.13.0/dix/dispatch.c:428 clientReady = 0x13f60b0 result = <optimized out> client = 0x147b480 nready = 0 icheck = 0x819eb0 <checkForInput> start_tick = 6080 #4 0x0000000000429b14 in main (argc=9, argv=<optimized out>, envp=<optimized out>) at /var/tmp/portage/x11-base/xorg-server-1.13.0/work/xorg-server-1.13.0/dix/main.c:295 i = <optimized out> alwaysCheckForInput = {0, 1} (gdb) cont Continuing. Program received signal SIGABRT, Aborted. 0x00007f1f92e9db65 in raise () from /lib64/libc.so.6 In Xorg.0.log I find: rose@leopard:/home/rose(9)$ tail -n45 /var/log/Xorg.0.log.old [ 88071.660] (II) NOUVEAU(0): Modeline "1280x960"x0.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz e) [ 88455.794] (EE) [ 88455.794] (EE) Backtrace: [ 88455.816] (EE) 0: /usr/bin/Xorg (xorg_backtrace+0x34) [0x5954f4] [ 88455.816] (EE) 1: /usr/bin/Xorg (0x400000+0x1992f9) [0x5992f9] [ 88455.816] (EE) 2: /lib64/libpthread.so.0 (0x7f1f941ec000+0x10bf0) [0x7f1f941fcbf0] [ 88455.816] (EE) 3: /usr/lib64/xorg/modules/drivers/nouveau_drv.so (0x7f1f91cde000+0x10cf8) [0x7f1f91ceecf8] [ 88455.816] (EE) 4: /usr/lib64/xorg/modules/libshadowfb.so (0x7f1f91016000+0x3f5a) [0x7f1f91019f5a] [ 88455.816] (EE) 5: /usr/bin/Xorg (0x400000+0x36f43) [0x436f43] [ 88455.816] (EE) 6: /usr/bin/Xorg (0x400000+0x3aee1) [0x43aee1] [ 88455.816] (EE) 7: /usr/bin/Xorg (0x400000+0x29b14) [0x429b14] [ 88455.816] (EE) 8: /lib64/libc.so.6 (__libc_start_main+0xed) [0x7f1f92e8a60d] [ 88455.816] (EE) 9: /usr/bin/Xorg (0x400000+0x29e5d) [0x429e5d] [ 88455.816] (EE) [ 88455.816] (EE) Segmentation fault at address 0x7f1f9101e0d4 [ 88455.816] Fatal server error: [ 88455.816] Caught signal 11 (Segmentation fault). Server aborting [ 88455.816] [ 88455.816] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 88455.816] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 88455.816] (EE) [ 88455.841] (II) evdev: Power Button: Close [ 88455.841] (II) UnloadModule: "evdev" [ 88455.857] (II) evdev: Power Button: Close [ 88455.857] (II) UnloadModule: "evdev" [ 88455.873] (II) evdev: Microsoft Wired Keyboard 600: Close [ 88455.873] (II) UnloadModule: "evdev" [ 88455.889] (II) evdev: Microsoft Wired Keyboard 600: Close [ 88455.889] (II) UnloadModule: "evdev" [ 88455.905] (II) evdev: Microsoft Wired Keyboard 600: Close [ 88455.905] (II) UnloadModule: "evdev" [ 88455.921] (II) evdev: HID 046a:0023: Close [ 88455.921] (II) UnloadModule: "evdev" [ 88455.937] (II) evdev: HID 046a:0023: Close [ 88455.937] (II) UnloadModule: "evdev" [ 88455.953] (II) evdev: Logitech USB-PS/2 Optical Mouse: Close [ 88455.953] (II) UnloadModule: "evdev" [ 88455.969] (II) evdev: Logitech USB-PS/2 Optical Mouse: Close [ 88455.969] (II) UnloadModule: "evdev" [ 88455.970] (II) NOUVEAU(0): NVLeaveVT is called. [ 88456.005] Server terminated with error (1). Closing log file. root@leopard:/usr/src(18)# lspci -v -s 01:00.0 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 520] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 83c1 Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at fa000000 (32-bit, non-prefetchable) [size=16M] Memory at f0000000 (64-bit, prefetchable) [size=128M] Memory at f8000000 (64-bit, prefetchable) [size=32M] I/O ports at e000 [size=128] Expansion ROM at fb000000 [disabled] [size=512K] Capabilities: [60] Power Management version 3 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Capabilities: [b4] Vendor Specific Information: Len=14 <?> Capabilities: [100] Virtual Channel Capabilities: [128] Power Budgeting <?> Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?> Kernel driver in use: nouveau The following xorg-nouveau related packages are now installed: x11-drivers/xf86-video-nouveau-1.0.2 root@leopard:/root(3)# qlist -Iv xorg x11-base/xorg-drivers-1.13 x11-base/xorg-server-1.13.0 x11-base/xorg-x11-7.4-r2 x11-misc/xorg-cf-files-1.0.4 But I experience this issue already about six months, i.e, starting with xf86-video-nouveau-0.0.16_pre20120322 and xorg-server-1.12.0-r1.
Please attach full kernel and xserver logs as described here: http://nouveau.freedesktop.org/wiki/Bugs#HowToReport And next time it will crash, "print" (gdb command) as many variables from: http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/tree/src/nv_shadow.c#n32 as possible, in particular pNv->scanout->map.
It might be fixed by: http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=01c9a9cff7d6232ca6eafa59dd60833a0d9cdc5b
Please re-test this with the latest software (kernel, xf86-video-nouveau).
No response to re-test request in over a month. Closing as invalid.
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