** Description changed: + [Impact] + A bug in the implementation of the -evtouch driver's input configuration can lead to crashes due to failing to detect the end-of-list marker for the configuration options list. + + [Development Solution] + Patch incorporated into -evtouch in natty. + + [Stable Solution] + We carry the same upstream version of -evtouch in lucid, maverick, and natty, so the same patch can be used in all three versions without modification. + + [Test Case] + See original report + + [Regression Potential] + I think basically none. This is clearly incorrect code. + + The scope of a regression would be quite constrained as well, since + -evtouch is used only for a focused class of hardware. + + [Original Report] HW configuration: MX51 EVK board SW configuration: 1. Install xserver-xorg-input-evtouch page (version: 0.8.8-0ubuntu6.1) 2. Add fdi file by "vi /usr/share/hal/fdi/policy/20thirdparty/50-mxc-ts.fdi": <?xml version="1.0" encoding="ISO-8859-1"?> <deviceinfo version="0.2"> - <device> - <match key="info.product" contains="mxc_ts"> - <merge key="input.x11_driver" type="string">evtouch</merge> - </match> - </device> + <device> + <match key="info.product" contains="mxc_ts"> + <merge key="input.x11_driver" type="string">evtouch</merge> + </match> + </device> </deviceinfo> 3. reboot the board, X crash. The backtrace is as follows: Program received signal SIGSEGV, Segmentation fault. 0x402edae4 in strlen () from /lib/libc.so.6 (gdb) backtrace #0 0x402edae4 in strlen () from /lib/libc.so.6 #1 0x00096a4c in xf86optionListCreate () #2 0x0008f8d8 in xf86CollectInputOptions () #3 0x42d46b0c in EVTouchPreInit (drv=<value optimized out>, dev=0x329b88, - flags=<value optimized out>) at evtouch.c:1167 + flags=<value optimized out>) at evtouch.c:1167 #4 0x000861c8 in ?? () #5 0x000861c8 in ?? () However if i down-grade xserver-xorg-input-evtouch to version 0.8.8-0ubuntu3, Touch screen works fine. So what's the possible difference cause this issue?
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xf86-input-evtouch in ubuntu. https://bugs.launchpad.net/bugs/511491 Title: X crash when using touch screen on Freescale MX51 in Karmic _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
