On Thu, Dec 10, 2009 at 20:43, Bernie Thompson <bernie@xxxxxxxxxxxx> wrote: > On Thu, Dec 10, 2009 at 11:02 AM, James Simmons <jsimmons@xxxxxxxxxxxxx> wrote: >> That shouldn't happen. In the xorg.conf do you have in the >> >> Option UseFBDev "True" > > That option appears to have no effect (have tried both ways). Do you > know who parses it? Couldn't find it in core xserver. > > The DisplayLink support is still very rough, but it's currently using > its own X server driver > (http://libdlo.freedesktop.org/wiki/xf86-driver-displaylink), which > has some IOCTLs to its framebuffer driver, including a mode setting > IOCTL. > > If the arbitration between fbdev clients is intended to happen at the > point of mode setting, rather than at open(), that would explain the > problem. Are there any old posts or docs which describe how > arbitration is handled for the fbdev driver and multiple clients? Usually the X server locks the VT (virtual terminal) using an ioctl, and uses another ioctl to switch the VT to graphics mode, so fbcon will stop drawing to it. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
