Re: bug: firewire_sbp2 - timing out command
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From: Stefan R. <st...@s5...> - 2013-08-24 10:17:30
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On Jun 26 Stefan Richter wrote: > 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. Argh, two months went by and I haven't done anything with this issue. And this despite of the PL1100 sitting prominently n my living room, displacing quite a bit of air there, and thereby reminding me to look into the issue. I will eventually get to it, but at the moment paid work keeps me both busy and distracted. -- Stefan Richter -=====-===-= =--- ==--- http://arcgraph.de/sr/ |