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On my ubuntu laptop EL seems to fail very frequently with either 'invalid memory access' or 'invalid machine code' (or 'invalid instruction' - I need to translate back to English). Unfortunately the backtrace from gdb attached to el is not very helpful: planetmaker@etesia:~/eternal-lands/el194$ sudo gdb -p3137 gdb: Unbekannte Option »-p3137« Use `gdb --help' for a complete list of options. planetmaker@etesia:~/eternal-lands/el194$ sudo gdb -p 3137 GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1 Copyright (C) 2014 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-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word". Attaching to process 3137 Reading symbols from /home/planetmaker/eternal-lands/el194/el.x86_x64.linux.bin...(no debugging symbols found)...done. Reading symbols from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libpthread-2.19.so...done. done. [New LWP 3146] [New LWP 3142] [New LWP 3141] [New LWP 3140] [New LWP 3139] [New LWP 3138] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Loaded symbols for /lib/x86_64-linux-gnu/libpthread.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libstdc++.so.6 Reading symbols from /lib/x86_64-linux-gnu/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libgcc_s.so.1 Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libc.so.6 Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/ld-2.19.so...done. done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /usr/lib/x86_64-linux-gnu/libX11.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libX11.so.6 Reading symbols from /lib/x86_64-linux-gnu/libm.so.6...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libm-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libm.so.6 Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libdl-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libdl.so.2 Reading symbols from /usr/lib/x86_64-linux-gnu/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXau.so.6 Reading symbols from /lib/x86_64-linux-gnu/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libexpat.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libglapi.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libglapi.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libXext.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXext.so.6 Reading symbols from /usr/lib/x86_64-linux-gnu/libXdamage.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXdamage.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libXfixes.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXfixes.so.3 Reading symbols from /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb-present.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb-present.so.0 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libxcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxcb.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libxshmfence.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libxshmfence.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libdrm.so.2 Reading symbols from /usr/lib/x86_64-linux-gnu/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 Reading symbols from /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so...Reading symbols from /usr/lib/debug//usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so...done. done. Loaded symbols for /usr/lib/x86_64-linux-gnu/gconv/ISO8859-1.so Reading symbols from /usr/lib/x86_64-linux-gnu/libXrender.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXrender.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libXrandr.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXrandr.so.2 Reading symbols from /usr/lib/x86_64-linux-gnu/libXcursor.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libXcursor.so.1 Reading symbols from /lib/x86_64-linux-gnu/libudev.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libudev.so.1 Reading symbols from /lib/x86_64-linux-gnu/libcgmanager.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libcgmanager.so.0 Reading symbols from /lib/x86_64-linux-gnu/libnih.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libnih.so.1 Reading symbols from /lib/x86_64-linux-gnu/libnih-dbus.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libnih-dbus.so.1 Reading symbols from /lib/x86_64-linux-gnu/libdbus-1.so.3...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libdbus-1.so.3 Reading symbols from /lib/x86_64-linux-gnu/librt.so.1...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/librt-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/librt.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/dri/i965_dri.so Reading symbols from /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 Reading symbols from /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1 Reading symbols from /usr/lib/x86_64-linux-gnu/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/x86_64-linux-gnu/libpciaccess.so.0 Reading symbols from /lib/x86_64-linux-gnu/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libz.so.1 Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_files-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libnss_files.so.2 Reading symbols from /lib/x86_64-linux-gnu/libnss_myhostname.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libnss_myhostname.so.2 Reading symbols from /lib/x86_64-linux-gnu/libnss_mdns4_minimal.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/x86_64-linux-gnu/libnss_mdns4_minimal.so.2 Reading symbols from /lib/x86_64-linux-gnu/libnss_dns.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_dns-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libnss_dns.so.2 Reading symbols from /lib/x86_64-linux-gnu/libresolv.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libresolv-2.19.so...done. done. Loaded symbols for /lib/x86_64-linux-gnu/libresolv.so.2 __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:134 134 ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: Datei oder Verzeichnis nicht gefunden. Traceback (most recent call last): File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module> from libstdcxx.v6.printers import register_libstdcxx_printers ImportError: No module named 'libstdcxx' (gdb) continue Continuing. Program received signal SIGSEGV, Segmentation fault. 0x00007f88950ee700 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so (gdb) bt #0 0x00007f88950ee700 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #1 0x00007f88950b7d03 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #2 0x00007f8895037d36 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #3 0x00007f8894e7d6e3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #4 0x00007f8894e6078a in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #5 0x00007f8894e60bf5 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #6 0x00007f8894e61103 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #7 0x00007f8894e628c3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so #8 0x0000000000459151 in ?? () #9 0x00000000004710ee in ?? () #10 0x00000000004530a9 in ?? () #11 0x0000000000453394 in ?? () #12 0x0000000000447266 in ?? () #13 0x00000000004885f8 in ?? () #14 0x00000000004886d4 in ?? () #15 0x00007f88998f8ec5 in __libc_start_main (main=0x488660, argc=1, argv=0x7ffd8975d208, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd8975d1f8) at libc-start.c:287 #16 0x000000000040e4f9 in ?? () #17 0x00007ffd8975d1f8 in ?? () #18 0x000000000000001c in ?? () #19 0x0000000000000001 in ?? () #20 0x00007ffd8975e328 in ?? () #21 0x0000000000000000 in ?? () I'll try and see whether I can come up with more info and post here as it comes available. System config: Linux version 3.13.0-57-generic (buildd@brownie) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 planetmaker@etesia:~/eternal-lands/el194$ LC_ALL=C lshw -c video WARNING: you should run this program as super-user. *-display description: VGA compatible controller product: Broadwell-U Integrated Graphics vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:67 memory:f6000000-f6ffffff memory:e0000000-efffffff ioport:f000(size=64) WARNING: output may be incomplete or inaccurate, you should run this program as super-user. planetmaker@etesia:~/eternal-lands/el194$ LC_ALL=C lshw -c cpu WARNING: you should run this program as super-user. *-cpu product: Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 size: 500MHz capacity: 500MHz width: 64 bits capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap cpufreq WARNING: output may be incomplete or inaccurate, you should run this program as super-user.