The Ghostview program, which Okular uses internally to display the PostScript graphics that is included in this DVI file, is generally able to write its output in a variety of formats. The sub-programs that Ghostview uses for these tasks are called'device drivers'; there is one device driver for each format that Ghostview is able to write. Different versions of Ghostview often have different sets of device drivers available. It seems that the version of Ghostview that is installed on this computer does not contain any of the device drivers that are known to Okular. It seems unlikely that a regular installation of Ghostview would not contain these drivers. This error may therefore point to a serious misconfiguration of the Ghostview installation on your computer. If you want to fix the problems with Ghostview, you can use the command gs --help to display the list of device drivers contained in Ghostview. Among others, Okular can use the'png256 ', 'jpeg' and'pnm 'drivers. Note that Okular needs to be restarted to re-enable PostScript support.
O programa Ghostview, que se usa internamente para mostrar os gráficos PostScript que se inclúen neste ficheiro DVI, polo xeral é capaz de escribir a súa saída en diferentes formatos. Os subprogramas que Ghostview usa para estas tarefas son chamados « controladores de dispositivo »; hai un destes por cada formato que poda escribir Ghostview. Diferentes versións de Ghostview a miúdo teñen conxuntos de controladores diferentes. Semella que a versión que está instalada neste ordenador non contén ningún dos controladores coñecidos por Okular. É moi improbábel que unha instalación normal de Ghostview non conteña ningún destes controladores. Este erro pode en consecuencia indicar un problema grave na configuración da instalación de Ghostview no ordenador. Se quer corrixir os problemas con Ghostview, pode usar a orde gs -- help para mostrar a lista de controladores contidos en Ghostview. Entre outros, Okular pode usar « png256 », « jpeg » e « pnm ». Lembre que Okular precisa ser reiniciado para activar de novo o soporte de PostScript.