nanogui: /dev/fb0 Error
Subject:
RE: [nanogui] /dev/fb0 Error
From:
Nageswari S ####@####.####
Date:
6 Mar 2002 10:12:16 -0000
Message-Id: <4A2BA6A2F12BD511AAFA00606730DE9B0A6EC9@BLREXSR>
Dear Emmanuel,
I tried checking for the frame buffer.
This is the code I ran.
I got the message "The framebuffer device was opened successfully".
and then the error message "Error reading fixed information".
Can u tell me why the ioctl fails?
int main()
{
int fbfd = 0;
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
long int screensize = 0;
char *fbp = 0;
int x = 0, y = 0;
long int location = 0;
// Open the file for reading and writing
fbfd = open("/dev/fb0", O_RDWR);
if (!fbfd) {
printf("Error: cannot open framebuffer device.\n");
exit(1);
}
printf("The framebuffer device was opened successfully.\n");
// Get fixed screen information
if (ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo)) {
printf("Error reading fixed information.\n");
exit(2);
}
// Get variable screen information
if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo)) {
printf("Error reading variable information.\n");
exit(3);
}
return 0;
}
Thank you,
Regards,
Nageswari
-----Original Message-----
From: Emmanuel Blot ####@####.####
Sent: Wednesday, March 06, 2002 3:22 PM
To: Nageswari S; ####@####.####
Subject: RE: [nanogui] /dev/fb0 Error
You have configured MicroWindows for the Linux FrameBuffer: /dev/fb0 is the
access point to the kernel framebuffer driver.
Either configure and build for XWindows (in src dir: cp Config/config.x11
config and edit this file to match your requirements), or enable the
FrameBuffer on your machine (this can be done either by using the kernel
vesabg -see Lilo 'vga' option, for example- or by loading a FrameBuffer
module -see Documentation/fb/* in the /usr/src/linux directory)
Emmanuel.
-----Original Message-----
From: Nageswari S ####@####.####
Sent: Wed 2002-03-06 10:48
To: ####@####.####
Cc:
Subject: [nanogui] /dev/fb0 Error
Dear All,
I am new to Linux environment.
I have linux 2.4.17 kernel.
I have downloaded microwindows-0.89pre8 version.
I tried to "make" and run "mdemo" and "mterm".
I am getting the following error
Error Opening /dev/fb0: No such device check kernel config
Cannot initialise screen.
Can any body tell me what is this error and how do I solve it?
Thank you,
Regards,
Nageswari
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