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Getting a Trac account
Creating a bug report
Application bugs
Server bugs
Kernel bugs
Kernel Debugging Land - KDL
On screen debug output
Hardware/Driver bugs
What's next?

Reportar fallos

Ya que nuestros desarrolladores no pueden verificar todas las combinaciones de hardware, ni todas las posibles maneras de interactuar con el sistema operativo, confiamos que los usuarios nos den retroalimentación sobre cómo funcionan las cosas de su lado. Dado que Haiku todavía es muy joven, muy probablemente encontrará fallos. Le agradecemos por tomarse el tiempo para reportarlos. Juntos podemos mejorar a Haiku, bit a bit.

Para mantener nuestro rastreador de fallos efectivo, es esencial supeditarse a la Etiqueta del rastreador de fallos.

index Getting a Trac account

Para llenar un reporte, necesita tener una cuenta en el Rastreador de fallos de Haiku.
Cuando se cree una cuenta nueva, asegurese de proporcionar su correo electrónico pues es necesario obtener privilegios de modificación básica del reporte. Asegúrese de comprobar su carpeta de correo no deseado (spam) brevemente después, ya que a menudo toda verificación de correo importante termina allí.

index Creating a bug report

Antes de reportar un fallo, por favor asegúrese que aún no exista. Puede también usar la función de búsqueda para esto.
Tras haber establecido que es un fallo nuevo, haga su información tan puntual como sea posible:

index Application bugs

When an application crashed, you should invoke the debugger from the alert that pops up. This will open a Terminal window with gdb (the GNU debugger) running in it. Entering bt, you create a "backtrace" that you should copy in its entirety (including the part before you entered the bt command) and attach it to the ticket.

index Server bugs

When vital servers like the app server, the registrar or the input server crash, you won't see the usual crash alert. Instead the whole screen will be cleared white and a gdb session will be started, its output appearing directly on screen. Likely you will still be able to move the mouse, which will overwrite the white and gdb output on screen. Applications still running (like ProcessController or the clock in the Deskbar) might also draw over the debugger output on screen.
Besides everything being more ugly and inconvenient, basically the same applies as for application bugs. Most importantly procure a back trace (bt command). You may need to take a picture of the screen with a digital camera, since you won't be able to copy the text anywhere.

index Kernel bugs

Kernel bugs are usual the ones with the most severe effects while at the same time being the hardest to debug. There are different kinds of symptoms, which most likely point to a kernel or driver issue:

Note that while only the last point seems to indicate hardware relation, all the other symptoms could be caused by a bug in a hardware driver as well. If you have a suspicion what piece of hardware or corresponding driver might have to do with the problem, check whether removing/disabling the hardware or the driver makes a difference. For example, if you suspect Wifi you may find that your BIOS has an option to disable it. Or if not, you could remove the responsible Wifi driver from your Haiku installation (in /boot/system/add-ons/kernel/drivers/bin).

index Kernel Debugging Land - KDL

If the system hasn't entered KDL by itself, you can do that intentionally by invoking the keyboard shortcut ALT SysReq D.
Note that in KDL your keyboard may not work. PS/2 keyboards always do, USB keyboards connected via UHCI controllers do only, if one has entered KDL via the keyboard shortcut at least once. USB OHCI is not supported at the moment.

KDL itself is a kind of a shell. One can execute commands that print information about the system. The following commands might be of interest:

bt (aka sc) Prints a back trace. If the system entered KDL on its on volition, always enter that one.
ints Shows the handled and unhandled hardware interrupts.
co (aka continue) Leaves the kernel debugger and continues normal operation of the system, if that is possible.
reboot Reboots the system immediately. You will lose all unsaved data and even those that have been saved, but have not yet been written back to disk.

For more information, see the article Welcome to Kernel Debugging Land.

The KDL output is written to the serial port (if you have one, a respective cable, and a second computer to connect with, you can capture the output there via a terminal program) and to the syslog. If you can't leave KDL it won't be written to the syslog file, though. There's a boot loader debug option that allows you to capture it nonetheless (see below).

You can generate QR codes from KDL output that can then be converted to text using smartphones or similar devices. See the blog post QR Encode your KDL Output on how to get data out of KDL using that feature.

index Syslog

This is the preferred method for gaining information from a non-booting system.
The syslog (short for system log) contains valuable information about what has happened in your system, including the output of KDL sessions. It's usually a good idea to attach it to the kernel related Trac ticket. The syslog is written to the file /boot/common/var/log/syslog. Since writing to a file requires a working system, the most recent output might not have made it to the syslog when a kernel problem occurs (particularly on spontaneous reboots or uncontinuable KDL sessions).

The option Enable debug syslog in the boot loader's Debug menu makes the syslog somewhat persistent in memory. By default the option is enabled. "Somewhat persistent" means that it survives a reset and will still be accessible when you enter the boot loader menu directly afterwards. Booting an operating system (Haiku definitely, others likely) destroys the information, though. So you have to enter the boot loader menu by holding down SHIFT while booting.
In the boot loader's Debug menu you should now find the entries Display syslog from previous session and Save syslog from previous session. The former displays the syslog on screen, the latter allows you to save it as a file to disk. Note that at the moment only FAT32 volumes are supported for saving the file. If you want to use a USB stick, but have plugged it in too late so that it isn't recognized yet, you can reset the machine and re-enter the boot loader menu. But again: Don't accidentally boot any operating system or the data will be lost.

index On screen debug output

The on-screen debug output is useful only for debugging very specific issues and is known to have (timing) issues. Don't use it, if you don't have to.
This is only relevant when Haiku fails to boot on your machine and the Debug syslog option doesn't work for some reason. Before the Haiku boot logo appears, hold SHIFT to enter the boot loader menu. Select Select safe mode options. Near the bottom, [ ] Enable on screen debug output will be listed. (Note: The other options could be enabled in an attempt to boot Haiku. If Haiku will boot only when one or more options are activated, be sure to mention which ones.)
Finally select Return to main menu and then Continue booting.
One or more pages of text will display on the screen, only the last few lines need to be included on your ticket. There's more information on the Boot Loader.

index Hardware/Driver bugs

When dealing with a hardware/driver related bug, you should attach the following information as text files:

- listdev A detailed listing of your hardware, including vendor and pci id's, similar to Linux' lshw and lspci.
- listusb -v Assuming its a USB related issue, similar to lsusb.
- open /var/log/syslog The primary system log used by Haiku, akin to on screen debugging during boot. With the open command you can crop down the relevant part of the syslog in a text editor.
- listimage | grep drivers/ Lists all used drivers.
- ints Only available within Kernel Debugging Land (see above). Shows interrupt usage. There shouldn't be too many that are shared by different devices.
- On screen debug output (a safe mode boot time option).

The first four commands are entered into Terminal. Add a > output.txt after a command, and it's piped into a text file called "output.txt" that you can attach to your bug report or email.


Después que un fallo se ha reportado, un desarrollador verá el reporte e intentará clasificarlo. Recuerde, todos somos voluntarios, y por ello, algunas veces un fallo pudiera estar sin responderse por un tiempo. Agregar nueva información cuando esté disponible usualmente ayuda a que se escoja un fallo más rápidamente, pero no intente 'levantar' el fallo agregando comentarios no descriptivos.

Recuerde, reportar un fallo no es algo en lo que tome un poquito de tiempo y sea todo. Si se reporta un fallo, se vuelve parte del proceso de desarrollo de Haiku. Los desarrolladores podrían llegar con preguntas mientras intentan arreglar el fallo reportado. Por favor, permanezca atento para responderlas. Considere su participación 'terminada' cuando el fallo se marque como 'arreglado'.