framebuffer driver

[Sudip Mukherjee]

an update .. I am getting the debug messages from ioctl ... by mistake
I placed the debugging messages in FBIOGET_CON2FBMAP.
so if ioctl is executing, on pressing alt+ctrl+F2 the console should
display on the second monitor (if i am wrong), but nothing is showing
on that.

sudip


On Fri, Dec 12, 2014 at 1:38 PM, Sudip Mukherjee
<sudipm.mukherjee at gmail.com> wrote:
> Hi,
> I have started with a pci based vga card. after booting i can see the
> card in lspci , and after loading the driver as a module i can see
> that the driver is linked with the device using lspci -k.
>
> for initial testing, i am using the ioctl command FBIOPUT_CON2FBMAP ,
> which is supposed to map a console to a particular framebuffer. But on
> switching to that console I am not getting anything in the monitor. To
> test if ioctl is getting executed, i inserted some debugging messages
> as pr_err() in that particular case of the ioctl function in
> drivers/video/fbdev/core/fbmem.c , but after calling the ioctl again i
> am not getting those debug messages in dmesg.
> Now i am in doubt about what is happening.. if ioctl is executed then
> my debug messages should have been printed.
>
> Can anyone please give me some hints about how to test this new vga
> card... and also why the debug messages from ioctl is not getting
> printed ..
>
> i think its almost a similar thing as https://lkml.org/lkml/2009/12/2/288
>
>
> thanks
> sudip