xsf-docs/faq/general.mdwn | 19 +++++++++++++++++++ xsf-docs/howto/use-gdb.mdwn | 42 +++++++++++++++++++++++++++++++++++------- 2 files changed, 54 insertions(+), 7 deletions(-)
New commits: commit a0dbd236a467fcd688e85d33a5409eadc6c75e38 Author: Cyril Brulebois <[email protected]> Date: Thu Feb 24 19:17:47 2011 +0100 use-gdb: Mention getting a core with gdm3. diff --git a/xsf-docs/howto/use-gdb.mdwn b/xsf-docs/howto/use-gdb.mdwn index 89de47e..daa7cc9 100644 --- a/xsf-docs/howto/use-gdb.mdwn +++ b/xsf-docs/howto/use-gdb.mdwn @@ -45,6 +45,17 @@ that.** ## Actual gdb work +### Getting a core file + + * Using `gdm3`: The idea is to tweak the daemon’s + `LocalXserverCommand` setting, adding the `-core` option. As of + `gdm3 2.30`, the defaults can be found in + `/usr/share/gdm/gdm.schemas`. Sample `/etc/gdm3/daemon.conf` + excerpt: + + [daemon] + LocalXserverCommand=/usr/bin/Xorg -br -verbose -audit 0 -novtswitch -core + ### Loading a core file That’s trivial: commit 69be710b26fb230628f64da67d0018d579ed868f Author: Cyril Brulebois <[email protected]> Date: Thu Feb 24 19:00:13 2011 +0100 use-gdb: Mention the needed steps for each approach. diff --git a/xsf-docs/howto/use-gdb.mdwn b/xsf-docs/howto/use-gdb.mdwn index 4ae55ba..89de47e 100644 --- a/xsf-docs/howto/use-gdb.mdwn +++ b/xsf-docs/howto/use-gdb.mdwn @@ -19,12 +19,23 @@ This is a *post-mortem* approach. The idea is to run X with the `-core` option. Once it dies, a core file (`/etc/X11/core`) is generated, and can be loaded from `gdb`. +Follow these steps: + + 1. Getting a core file. + 2. Loading a core file. + 3. Displaying/saving a backtrace. + ### Two-machine approach You pay the “need a second machine” price, but that buys you interactivity. Just log into the first machine from the second one, using `ssh`. +Follow these steps: + + 1. Attaching/Starting X from gdb. + 2. Displaying/saving a backtrace. + ### Needed packages Obviously, `gdb` is needed; `xserver-xorg-core-dbg` contains the commit 9de1c5e28da7ecba417876671cdfef1ea9bd335f Author: Cyril Brulebois <[email protected]> Date: Thu Feb 24 18:52:57 2011 +0100 use-gdb: Mention loading a core dump. diff --git a/xsf-docs/howto/use-gdb.mdwn b/xsf-docs/howto/use-gdb.mdwn index a3be461..4ae55ba 100644 --- a/xsf-docs/howto/use-gdb.mdwn +++ b/xsf-docs/howto/use-gdb.mdwn @@ -34,6 +34,14 @@ that.** ## Actual gdb work +### Loading a core file + +That’s trivial: + + # gdb -c /etc/X11/core + +Now `gdb` is ready to display backtraces. + ### Attaching X from gdb The way of starting X doesn’t really matter, as `gdb` makes it commit 2951c0265f337b17d95e2f16f149e1e11f504e52 Author: Cyril Brulebois <[email protected]> Date: Thu Feb 24 18:50:20 2011 +0100 use-gdb: Mention the core file for the single machine approach. diff --git a/xsf-docs/howto/use-gdb.mdwn b/xsf-docs/howto/use-gdb.mdwn index df7152d..a3be461 100644 --- a/xsf-docs/howto/use-gdb.mdwn +++ b/xsf-docs/howto/use-gdb.mdwn @@ -15,17 +15,15 @@ with a single machine. ### One-machine approach -From a console (let’s assume it’s `vt1`), open a `root` -terminal. Then, start a loop which will bring you back to this console -after a given delay (in the following example, every 60 seconds), just -in case. The ampersand (`&`) at the end makes it a background job. - - while :; do sleep 60; chvt 1; done & +This is a *post-mortem* approach. The idea is to run X with the +`-core` option. Once it dies, a core file (`/etc/X11/core`) is +generated, and can be loaded from `gdb`. ### Two-machine approach -That’s simpler, but then you need a second machine. Just log into the -first machine from the second one, using `ssh`. +You pay the “need a second machine” price, but that buys you +interactivity. Just log into the first machine from the second one, +using `ssh`. ### Needed packages commit 25fbfe0adec72cd09ceee2f8055f583602e6eb75 Author: Cyril Brulebois <[email protected]> Date: Thu Feb 24 18:39:55 2011 +0100 faq/general: Mention configure-input, and terminate:ctrl_alt_bksp. diff --git a/xsf-docs/faq/general.mdwn b/xsf-docs/faq/general.mdwn index 80c23f3..515bc78 100644 --- a/xsf-docs/faq/general.mdwn +++ b/xsf-docs/faq/general.mdwn @@ -3,6 +3,14 @@ Cyril Brulebois <[email protected]> +## Input drivers + + * *How do I configure input for X?* + Look at the [how to configure input](../howto/configure-input.html) documentation. + + * *Why can’t I kill X through `Ctrl+Alt+Backspace`?* + That’s explained in the above-mentioned documentation. + ## Video drivers ### Intel driver commit c9df1b6b4b232d43f35f0456dd731428f9a982ef Author: Cyril Brulebois <[email protected]> Date: Mon Feb 21 16:56:06 2011 +0100 faq/general: Mention how to start a bare X session. diff --git a/xsf-docs/faq/general.mdwn b/xsf-docs/faq/general.mdwn index 8e86196..80c23f3 100644 --- a/xsf-docs/faq/general.mdwn +++ b/xsf-docs/faq/general.mdwn @@ -37,3 +37,14 @@ Cyril Brulebois <[email protected]> (view it online: [for squeeze](http://git.debian.org/?p=pkg-xorg/driver/xserver-xorg-video-nouveau.git;a=blob;f=debian/README.Debian;h=27ced6b1bf5102a5b72525318439efdfb330745d;hb=6c2f12ca18f55b55d49e083d86d87d970ce53a07), [for sid](http://git.debian.org/?p=pkg-xorg/driver/xserver-xorg-video-nouveau.git;a=blob;f=debian/README.Debian)). + + +## Others + +### Session management + + * *How to start a bare X session (without Gnome, KDE, etc.)?* + Assuming there’s no X running on the `:1` display, run this from a + VT: + + startx /usr/bin/xterm -- :1 -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". 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