[Bug 1554004] Re: Segfault on X startup with VX900

Dariusz Gadomski 1554004 at bugs.launchpad.net
Mon Mar 14 12:52:15 UTC 2016


SRU proposal for Wily (changed version number to avoid collision with
Xenial)

** Patch removed: "wily_xserver-xorg-video-openchrome_0.3.3-1ubuntu2.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-openchrome/+bug/1554004/+attachment/4594964/+files/wily_xserver-xorg-video-openchrome_0.3.3-1ubuntu2.debdiff

** Patch added: "wily_xserver-xorg-video-openchrome_0.3.3-1ubuntu1.1.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-openchrome/+bug/1554004/+attachment/4598670/+files/wily_xserver-xorg-video-openchrome_0.3.3-1ubuntu1.1.debdiff

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Title:
  Segfault on X startup with VX900

Status in openchrome:
  Fix Released
Status in xserver-xorg-video-openchrome package in Ubuntu:
  Fix Released
Status in xserver-xorg-video-openchrome source package in Trusty:
  New
Status in xserver-xorg-video-openchrome source package in Wily:
  New

Bug description:
  [Impact]

   * Prevents from using X at all with some VIA chipsets - a segfault
  occurs and is logged in Xorg.log

  [Test Case]

   * Start X on a affected hw (e.g. VX900).

   * Examine Xorg.log after crash.

  [Regression Potential]

   * This is a bug fixed upstream
  (https://cgit.freedesktop.org/openchrome/xf86-video-
  openchrome/commit/?id=ecb1695ac2de1d840c036f64b5b71602e0f522a4).

   * The fix is a one-liner with minimal impact.

  [Other Info]

   * Original bug description:

  There is a segfault in Xorg.log visible when starting X on Trusty
  14.04 with the following hardware:

  00:01.0 VGA compatible controller [0300]: VIA Technologies, Inc. VX900 Graphics [Chrome9 HD] [1106:7122] (prog-if 00 [VGA controller])
          Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000]
          Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
          Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
          Latency: 64
          Interrupt: pin A routed to IRQ 10
          Region 0: Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
          Region 1: Memory at fc000000 (32-bit, non-prefetchable) [size=16M]
          Region 2: Memory at f0000000 (32-bit, prefetchable) [size=128M]
          Expansion ROM at febf0000 [disabled] [size=64K]
          Capabilities: [60] Power Management version 2
                  Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                  Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
          Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit+
                  Address: 0000000000000000  Data: 0000

  Snip of the Xorg.log:
  [   549.260] (EE) Backtrace:
  [   549.260] (EE) 0: /usr/bin/X (xorg_backtrace+0x4f) [0xb77551bf]
  [   549.261] (EE) 1: /usr/bin/X (0xb75ac000+0x1acfa4) [0xb7758fa4]
  [   549.261] (EE) 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb7589410]
  [   549.261] (EE) 3: /usr/lib/xorg/modules/drivers/openchrome_drv.so (0xb6c84000+0x13ccc) [0xb6c97ccc]
  [   549.261] (EE) 4: /usr/bin/X (InitOutput+0xb43) [0xb762f623]
  [   549.261] (EE) 5: /usr/bin/X (0xb75ac000+0x410c7) [0xb75ed0c7]
  [   549.262] (EE) 6: /usr/bin/X (0xb75ac000+0x2ae1e) [0xb75d6e1e]
  [   549.262] (EE) 7: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0xb7197a83]
  [   549.262] (EE) 8: /usr/bin/X (0xb75ac000+0x2ae54) [0xb75d6e54]
  [   549.262] (EE)
  [   549.262] (EE) Segmentation fault at address 0x0
  [   549.262] (EE)
  [   549.263] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [   549.263] (EE)
  [   549.263] (EE)
  [   549.263] (EE) Please also check the log file at "/var/log/Xorg.1.log" for additional information.
  [   549.263] (EE)
  [   549.269] (EE) Server terminated with error (1). Closing log file.

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