Re: bug: firewire_sbp2 - timing out command
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From: Stefan R. <st...@s5...> - 2013-06-26 17:11:58
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Hi Renan, about a week ago I received a UMAX PowerLook 1100, with transparency option even. I didn't get around to actually start testing it until today. My first results: a) The PowerLook 1100 works OK with VueScan 9.0.96 on OS X 10.4. b) My other FireWire scanner, the Epson Perfection 2450 Photo, works OK with VueScan 9.2.21 x64 on Gentoo Linux AMD64, kernel 3.9. c) Latter system and software, but UMAX PowerLook 1100, gets this far: - PowerLook 1100 is detected properly by kernel and VueScan. - Starting a preview in VueScan results in two messages "kernel: scsi 184:0:0:0: timing out command, waited 120s" but eventually succeeds. The scanner isn't particularly fast to begin with, but having to wait four extra minutes is a bit much of course... ;-/ - After that, starting a scan sets the scanner immediately into action and goes through the entire scan just fine, without command timeout. d) After that I tried skanlite 1.0 + sane-backends 1.0.23-r1 on the same Gentoo Linux box. It discovered the PowerLook but crashed immediately when I initiated the preview. However, SANE's UMAX SCSI backend does not have official support for PowerLook 1100 yet, so nobody is to blame. So in this single first test on Linux, VueScan + PowerLook 1100 did actually work for me, but there were command timeouts which prolonged the preview. Warm-up doesn't take so long; this is about 25 seconds or so on OS X, judging from the time between pressing the preview buttun and the moment when the scanner starts to blink its LED and to make noises. I don't have a precise idea which step to take next, but one thing which comes to my mind is to look at firewire-sbp2's way to align the commands in memory. -- Stefan Richter -=====-===-= -==- ==-=- http://arcgraph.de/sr/ |