[Bug 1606774] Re: Xorg crash

[Christopher M. Penalver]

C Michal, it will help immensely if you filed a new report with Ubuntu by 
ensuring you have the package xdiagnose installed, and that you click the Yes 
button for attaching additional debugging information running the following 
from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.

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Title:
  Xorg crash

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[Bug 1606774] Re: Xorg crash

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: xorg-server (Ubuntu)
   Status: New => Confirmed

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[Bug 1606774] Re: Xorg crash

[C Michal]

I see very similar crashes since upgrading from 15.10 to 16.04. I'm on a
Lenovo ideapad 300 with Skylake graphics

Xorg.log backtrace:

[   167.216] (EE) Backtrace:
[   167.237] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e) [0x55cd120e95ce]
[   167.237] (EE) 1: /usr/lib/xorg/Xorg (0x55cd11f37000+0x1b6959) 
[0x55cd120ed959]
[   167.238] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fbb14a49000+0x354a0) 
[0x7fbb14a7e4a0]
[   167.238] (EE) 3: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 
(pixman_region_selfcheck+0x94) [0x7fbb15bd5194]
[   167.238] (EE) 4: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 
(pixman_region_intersect+0x3b) [0x7fbb15bd549b]
[   167.238] (EE) 5: /usr/lib/xorg/Xorg (0x55cd11f37000+0x127180) 
[0x55cd1205e180]
[   167.238] (EE) 6: /usr/lib/xorg/Xorg (0x55cd11f37000+0x12958b) 
[0x55cd1206058b]
[   167.238] (EE) 7: /usr/lib/xorg/Xorg (ValidatePicture+0x9) [0x55cd12062359]
[   167.238] (EE) 8: /usr/lib/xorg/Xorg (CompositeTrapezoids+0x67) 
[0x55cd12062827]
[   167.238] (EE) 9: /usr/lib/xorg/Xorg (0x55cd11f37000+0x130832) 
[0x55cd12067832]
[   167.238] (EE) 10: /usr/lib/xorg/Xorg (0x55cd11f37000+0x53bbf) 
[0x55cd11f8abbf]
[   167.238] (EE) 11: /usr/lib/xorg/Xorg (0x55cd11f37000+0x57c33) 
[0x55cd11f8ec33]
[   167.238] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) 
[0x7fbb14a69830]
[   167.238] (EE) 13: /usr/lib/xorg/Xorg (_start+0x29) [0x55cd11f78f59]
[   167.238] (EE) 
[   167.238] (EE) Segmentation fault at address 0x55cdb01b534e

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[Bug 1606774] Re: Xorg crash

[Nito]

New crash, and backtrace now with the new BIOS update:


gdb /usr/lib/xorg/Xorg core 
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
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:
.
Find the GDB manual and other documentation resources online at:
.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib/xorg/Xorg...Reading symbols from 
/usr/lib/debug/.build-id/56/f0a78a23cd036ac69718bda45a41881ef5ec75.debug...done.
done.
[New LWP 11246]
[New LWP 11248]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/xorg/Xorg -core :0 -seat seat0 -auth 
/var/run/lightdm/root/:0 -noliste'.
Program terminated with signal SIGABRT, Aborted.
#0  0x7f040445e418 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/unix/sysv/linux/raise.c:54
54  ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
[Current thread is 1 (Thread 0x7f04066b5a00 (LWP 11246))]
(gdb) backtrace
#0  0x7f040445e418 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x7f040446001a in __GI_abort () at abort.c:89
#2  0x7f04044a072a in __libc_message (do_abort=do_abort@entry=2, 
fmt=fmt@entry=0x7f04045b96b0 "*** Error in `%s': %s: 0x%s ***\n")
at ../sysdeps/posix/libc_fatal.c:175
#3  0x7f04044a8f4a in malloc_printerr (ar_ptr=, 
ptr=, 
str=0x7f04045b9728 "free(): invalid next size (fast)", action=3)
at malloc.c:5007
#4  _int_free (av=, p=, have_lock=0)
at malloc.c:3868
#5  0x7f04044acabc in __GI___libc_free (mem=)
at malloc.c:2969
#6  0x7f04055b5753 in pixman_region_intersect ()
   from /usr/lib/x86_64-linux-gnu/libpixman-1.so.0
#7  0x561c62734180 in RegionIntersect (reg2=, 
reg1=0x561c65492b40, newReg=)
at ../../include/regionstr.h:233
#8  miValidatePicture (pPicture=0x561c654bc6f0, mask=)
at ../../render/mipict.c:148
#9  0x561c6273658b in ValidateOnePicture (
pPicture=pPicture@entry=0x561c654bc6f0) at ../../render/picture.c:1387
#10 0x561c62738359 in ValidatePicture (
pPicture=pPicture@entry=0x561c654bc6f0) at ../../render/picture.c:1396
#11 0x561c62738827 in CompositeTrapezoids (op=, 
pSrc=0x561c654bc790, pDst=0x561c654bc6f0, maskFormat=0x561c64b1e0d8, 
xSrc=, ySrc=, ntrap=1, 
traps=0x561c65770f10) at ../../render/picture.c:1598
#12 0x561c6273d832 in ProcRenderTrapezoids (client=0x561c650d66d0)
at ../../render/render.c:759
#13 0x561c62660bbf in Dispatch () at ../../dix/dispatch.c:430
#14 0x561c62664c33 in dix_main (argc=11, argv=0x7ffca37d1bf8, 
envp=) at ../../dix/main.c:300
#15 0x7f0404449830 in __libc_start_main (main=0x561c6264ef20 , 
argc=11, argv=0x7ffca37d1bf8, init=, 
fini=, rtld_fini=, 
stack_end=0x7ffca37d1be8) at ../csu/libc-start.c:291
#16 0x561c6264ef59 in _start ()
(gdb)

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[Bug 1606774] Re: Xorg crash

[Christopher M. Penalver]

** Tags removed: bios-outdated-1.4.4
** Tags added: latest-bios-1.4.4

** Changed in: xorg-server (Ubuntu)
   Importance: Low => Medium

** Changed in: xorg-server (Ubuntu)
   Status: Incomplete => New

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[Bug 1606774] Re: Xorg crash

[Timo Aaltonen]

** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)

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[Bug 1606774] Re: Xorg crash

[Nito]

New crash.

Couldn't attach the core backtrace (it was truncated due not enough
space in /)

the log file is attached.

My feeling (so far) is that it happens less frequently.

Will update with backtrace if I get another error.

** Attachment added: "Xorg.0.log.old"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1606774/+attachment/4712356/+files/Xorg.0.log.old

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[Bug 1606774] Re: Xorg crash

[Nito]

Bios upgraded:

sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
1.4.4
06/14/2016


Waiting on the next time it reproduces.

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[Bug 1606774] Re: Xorg crash

[Christopher M. Penalver]

Nito, as per http://www.dell.com/support/home/us/en/19/product-
support/product/xps-13-9350-laptop/drivers?os=biosa an update to your
computer's buggy, insecure, and outdated BIOS is available (1.4.4). When
you update to this following
https://help.ubuntu.com/community/BIOSUpdate how does this improve the
situation?

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

Also, you don't have to create a new report.

Once the BIOS is updated, if the problem is still reproducible:
1) Please provide the output of the following terminal command (not perform an 
apport-collect):
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on how this improves the 
situation.
3) Please mark this report Status New.

If it's not reproducible, please mark this as Invalid.

Thank you for your help.

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[Bug 1606774] Re: Xorg crash

[Christopher M. Penalver]

** Tags added: regression-release

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[Bug 1606774] Re: Xorg crash

[Nito]

Yes, after upgrading from 14.04 to 16.04.1

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[Bug 1606774] Re: Xorg crash

[Christopher M. Penalver]

Nito, thank you for reporting this and helping make Ubuntu better.

Did the crashes start happening after an update?

** Tags added: bios-outdated-1.4.4

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
   Status: New => Incomplete

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[Bug 1606774] Re: Xorg crash

[Nito]

Output of

gdb /usr/lib/xorg/Xorg /core

** Attachment added: "gdb backtrace"
   
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1606774/+attachment/4707906/+files/gdb-backtrace.txt

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