[cups.general] notebook running hot

[Michael Sweet]

What Linux distribution are you using?  The regular TTY-based USB backend in CUPS doesn't try to connect in a tight loop like that.

On Aug 11, 2010, at 2:11 PM, ulrich.lauther at t-online.de wrote:

> On Wed, Aug 11, 2010 at 09:58:24AM -0700, Michael Sweet wrote:
>> Can you run "strace" on the process to see what it is doing?
>> 
> It is trying to open various usb- and lp-related device files and
> repeating on failure. I guess there should at least be a wait() before
> the repetition starts - but do not know which part of the system is
> responsible (the lp-subsystem or the usb-subsystem):
> 
> Below are the first 60 lines of output.
> 
> Best,
> 
> 	-ulrich lauther
> 
> Process 3094 attached - interrupt to quit
> open("/dev/usblp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp13", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp13", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp13", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp14", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp14", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp14", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp15", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp15", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp15", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp0", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp0", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp0", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp1", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp1", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp1", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp2", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp2", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp2", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp3", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp3", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp3", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp4", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp4", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp4", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp5", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp5", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp5", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp6", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp6", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp6", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp7", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp7", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp7", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp8", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp8", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp8", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp9", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp9", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp9", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp10", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp11", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/usblp12", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usblp13", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> open("/dev/usb/lp13", O_RDWR|O_EXCL|O_LARGEFILE) = -1 ENOENT (No such file or directory)
> 
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________________________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair