Still debugging why open(/dev/lpt0...) hangs
lpt0 is hanging up when it tries to request the ppbus (line 478 of lpt.c). I'm guessing that if_plip.c has requested it and not released it, which apparently happens when there's been an ioctl on the plip. There's no plausible reason why this should happen. What can I call in lpioctl (if_plip.c line 302) to print out some identifying information about the process doing the ioctl? Or is there a better list somewhere to ask this question? -- George Mitchell ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
FreeBSD 6: open(/dev/lpt0, O_WRONLY) hangup fixed
I've solved my /dev/lpt0 problem. Here is what happened: 1. I observed that the problem is also happening on FreeBSD 6.0. 2. It isn't happening on 5.3. 3. I sprinkled some printf's into lptopen in sys/dev/ppbus/lpt.c. 4. I compiled a new kernel, stripping a whole bunch of stuff out of the generic kernel. The problem went away. 5. I went back to the original lpt.c. Still working. 6. I compiled another kernel, adding device plip back in. The problem came back. So the problem, whatever it is, seems to involve an interaction between printing and plip. Since I have printing working again, debugging the problem is no longer a high priority for me. But if anyone has some suggestions for debugging, I would be happy to try them this weekend. Am I the only dinosaur still using a parallel port printer? It seems incredible to me that no one else using 6.0/6.1 could have encountered this problem. Even though I have fixed the problem, it should probably be debugged properly, unless there's sentiment for removing device plip from the generic kernel. -- George Mitchell ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
FreeBSD 6.1: open(/dev/lpt0, O_WRONLY) hangs up
Print jobs get into my print queu, but they don't get out. So I started debugging lpd. After a lot of screwing around, I discovered that the program was hanging up on line 1875 of printjob.c: pfd = open(pp-lp, pp-rw ? O_RDWR : O_WRONLY); pp-lp is /dev/lpt0 pp-rw is 0 So then I returned to my shell prompt and typed in: cat /dev/null /dev/lpt0 and that hung up uninterruptibly. What's going on? FreeBSD 6.1-RELEASE, unmodified generic kernel. All this worked normally under 5.3, though that needed 'hw.intr_storm_threshold=2000'. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
P.S. FreeBSD 6.1: open(/dev/lpt0, O_WRONLY) hangs up
P.S. Here's what dmesg has to say about my parallel port: ppc0: ECP parallel printer port port 0x378-0x37f,0x778-0x77b irq 7 drq 3 on acpi0 ppc0: Generic chipset (ECP/PS2/NIBBLE) in COMPATIBLE mode ppc0: FIFO with 16/16/16 bytes threshold ppbus0: Parallel port bus on ppc0 ppbus0: IEEE1284 device found /NIBBLE/ECP Probing for PnP devices on ppbus0: ppbus0: OKI DATA CORP OKIPAGE 10ex PJL,PCLXL,PCL,EPSONFX,IBMPPR plip0: PLIP network interface on ppbus0 lpt0: Printer on ppbus0 lpt0: Interrupt-driven port ppi0: Parallel I/O on ppbus0 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
More FreeBSD 6.1: open(/dev/lpt0, O_WRONLY) hangs up
More information about my /dev/lpt0 problem: 1. Enabling or disabling ACPI has no effect. 2. If I boot up in single user mode, I can cat a file to /dev/lpt0 and it prints on the printer. 3. Once I go to mutliuser mode, open(/dev/lpt0,O_WRONLY) hangs forever whether I start lpd or not. 4. If I shutdown now to get back to single user mode and then cat datafile /dev/lpt0, it hangs until I type control-C, at which point the shell says: cannot create /dev/lpt0: Interrupted system call (which really means, looking at the code in /usr/src/bin/sh/redir.c, cannot OPEN /dev/lpt0). Help! -- George Mitchell ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
