Date: Thu, 23 Sep 2004 21:57:25 +1000 From: Phillip Crumpler <listsubs@crippy.mel.crumpler.com.au> To: freebsd-hackers@freebsd.org Cc: freebsd-mobile@freebsd.org Subject: Error 1802: IBM T41 doesn't like other network cards Message-ID: <4152BA25.70102@crippy.mel.crumpler.com.au>
next in thread | raw e-mail | index | archive | help
Hello hackers, Wanting to try out Sam Leffler's wireless layer back-port I tried to replace the Intel miniPCI wireless card in my Thinkpad T41 (2373) with an Atheros based one. I had a Netgear WAG311 handy - these are an Atheros miniPCI wireless NIC on a PCI carrier - so I levered the top off and freed the miniPCI card. Ten minutes of open-notebook surgery later I started the machine with the replacement card in, only to find it won't boot: ERROR 1802 Unauthorized network card is plugged in - Power off and remove the miniPCI card. It seems that the IBM BIOS refuses to boot if the miniPCI card installed is on IBM's approved list. This thread: http://www.ussg.iu.edu/hypermail/linux/kernel/0406.1/1048.html describes a workaround that requires a byte to be set in the cmos, including a snippet (below) to do the job on linux. This opens and writes to /dev/nvram to set the byte. Is there an equivalent on FreeBSD? Would I find the CMOS somewhere in /dev/mem? Anyone else has similar problems? BMS@ reported ditching the Centrino card in his T40 but didn't mention if he replaced it with something else. thanks Phillip Crumpler ============================================================ #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <sys/stat.h> #include <fcntl.h> int main(void) { int fd; unsigned char data; printf("Disabling WiFi whitelist check.\n"); fd = open("/dev/nvram", O_RDWR); lseek(fd, 0x5c, SEEK_SET); read(fd, &data, 1); printf("CMOS address 0x5c: %02x->", data); data |= 0x80; printf("%02x\n", data); lseek(fd, 0x5c, SEEK_SET); write(fd, &data, 1); close(fd); printf("Done.\n"); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4152BA25.70102>