Neal Peacock <kulimandpho...@gmail.com> writes:
> Isn't that expected?
no
> The last command turned it off, did you try turning it back on?
echo 0 turns it on
and to be clear:
"echo 4 > $P"
is not enough to produce the problem
you have to call it twice
"echo 4 > $P; echo 4 > $P"
you can also try something like:
/*BINFMTC:
*/
#include <stdio.h>
#include <assert.h>
#include <linux/fb.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(int argc, char** argv) {
int fd=open("/dev/fb0",O_RDWR);
assert(fd!=-1);
printf("%d\n",ioctl(fd, FBIOBLANK, FB_BLANK_POWERDOWN));
printf("%d\n",ioctl(fd, FBIOBLANK, FB_BLANK_POWERDOWN));
printf("%d\n",ioctl(fd, FBIOBLANK, FB_BLANK_UNBLANK));
return 0;
}
greetings,
karme
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