我在尝试使用 SCSI 扫描仪时遇到了问题。
我目前正在运行 Ubuntu 16.04 LTS。扫描仪是 AGFA Arcus 1200，我于 2003 年购买了二手扫描仪。它工作正常，我经常使用它，大约十年了，然后我停止了摄影工作一段时间，扫描仪甚至在大约五年内都没有通电。此时，扫描仪通电并发出校准声音，但操作系统似乎无法检测到它。我有与此扫描仪一直使用的相同的 SCSI 电缆和端接器，我的 SCSI 卡出现在lspci：
$ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD9x0/RX980 Host Bridge (rev 02)
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD890S/RD990 I/O Memory Management Unit (IOMMU)
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GFX port 0)
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 0)
00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 1)
00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 4)
00:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 5)
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 42)
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:16.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 5
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750] (rev a2)
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)
02:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (rev 01)
03:00.0 Serial controller: Device 1c00:3250 (rev 10)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
05:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9123 PCIe SATA 6.0 Gb/s controller (rev 11)
05:00.1 IDE interface: Marvell Technology Group Ltd. 88SE912x IDE Controller (rev 11)
06:06.0 SCSI storage controller: Adaptec AIC-7850T/7856T [AVA-2902/4/6 / AHA-2910] (rev 03)
sane-find-scanner似乎可以检测到扫描仪，但simple-scan也xsane无法检测到扫描仪。
$ sudo sane-find-scanner
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
found SCSI processor "Marvell 91xx Config 1.01" at /dev/sg4
# Your SCSI scanner was detected. It may or may not be supported by SANE. Try
# scanimage -L and read the backend's manpage.
could not fetch string descriptor: Pipe error
could not fetch string descriptor: Pipe error
# No USB scanners found. If you expected something different, make sure that
# you have loaded a kernel driver for your USB host controller and have setup
# the USB system correctly. See man sane-usb for details.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
我不太确定该设备/dev/sd4是不是我的扫描仪；我不记得扫描仪上有什么叫做“Marvell”的东西，当我在 Google 上搜索该描述符时，它似乎是一个 IDE 控制器。
根据建议，我尝试过scanimage -L：
$ scanimage -L
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
我不知道接下来该怎么做，检查我的扫描仪硬件是否出现故障，或者它太旧了，Ubuntu 16.04 无法处理（通常不是一个大问题——旧硬件是 Ubuntu 擅长的事情之一）。我确信自从我切换到 Linux 以来，我就一直使用这个扫描仪，但它可能是在 Mepis 11 或更旧版本的 Ubuntu（Kubuntu 14.04）下运行的。
答案1
我希望这只是一件简单的事情，事实也确实如此。
我的脑海中突然响起了一阵铃声，在解决了“闪烁代码”问题后（我把胶片扫描托盘插反了，所以扫描仪看不到校准条），我隐约记得 SCSI 对启动顺序很敏感——因此，在打开扫描仪的电源并让其完全完成预热和校准后，我重新启动了计算机。
现在，可以xsane正确检测并识别扫描仪了。现在我可以扫描我的底片了……