At Fri, 17 Apr 2009 02:15:33 -0700, Don Stewart wrote:
jim:
At Wed, 1 Apr 2009 08:57:32 +0100 (BST), Jim Burton wrote:
At Tue, 31 Mar 2009 18:23:49 -0500, Spencer Janssen wrote:
On Tue, Mar 31, 2009 at 07:50:29AM +0100, Jim Burton wrote:
Hi, I'm using xmonad 0.8.1, GHC 6.10, Ubuntu intrepid, and every now and then I get an X error immediately after logging in and am bounced back to the login screen. Logging in again normally works fine. Here is .xsession-errors from one of those occasions:
[snip]
Can anyone tell me how to get a stack trace when xmonad crashes or otherwise diagnose my problem? The problem does indeed persist and I don't know if it's a known bug etc.
The main way is to attach gdb to the core, and we'll see if it is in Haskell code (meaning a GHC bug or FFI binding error), or in X11 code (X bug?).
Hi Don, Thanks for your reply. I've never used gdb -- any advice on what exactly I need to do? I think I need to start this from .xinitrc as when xmonad crashes it does so on login so will it be something like # in .xinitrc #$CABAL_BIN/xmonad gdb $CABAL_BIN/xmonad > ~/debug.txt ?
The most important thing is to list GHC versions, X11 versions, Haskell library versions, and to ensure it is clean build.
I listed most of these already: GHC 6.10.1, X version is (the ubuntu intrepid package) 1:7.4~5ubuntu3, xmonad 0.8.1 installed via cabal. Re a clean build, I tried to upgrade/reinstall with cabal just now and it fails when trying to install unix: Building unix-2.3.2.0... [ 1 of 21] Compiling System.Posix.User ( dist/build/System/Posix/User.hs, dist/build/System/Posix/User.o ) [ 2 of 21] Compiling System.Posix.Unistd ( dist/build/System/Posix/Unistd.hs, dist/build/System/Posix/Unistd.o ) [ 3 of 21] Compiling System.Posix.Time ( dist/build/System/Posix/Time.hs, dist/build/System/Posix/Time.o ) [ 4 of 21] Compiling System.Posix.Resource ( dist/build/System/Posix/Resource.hs, dist/build/System/Posix/Resource.o ) [ 5 of 21] Compiling System.Posix.Process.Internals ( System/Posix/Process/Internals.hs, dist/build/System/Posix/Process/Internals.o ) System/Posix/Process/Internals.hs:10:17: Module `GHC.Conc' does not export `Signal' cabal: Error: some packages failed to install: containers-0.2.0.1 failed during the building phase. The exception was: exit: ExitFailure 1 directory-1.0.0.3 depends on unix-2.3.2.0 which failed to install. process-1.0.1.1 depends on unix-2.3.2.0 which failed to install. unix-2.3.2.0 failed during the building phase. The exception was: exit: ExitFailure 1 xmonad-0.8.1 depends on unix-2.3.2.0 which failed to install.
Then, narrow down the extensions you're using to find the smallest set that produces the error.
Let me know if it's useful to see my .xinitrc and xmonad.hs. I am using very few extensions, just tabbed layout. I'll experiment with removing this. Thanks, Jim