Color Scan with Brother ADS-1100 over wifi produces an exception. #775
Description
Describe the bug
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Scanner is Brother ADS-1100
Wifi connected
scanning black and white or grayscale is working
scanning 24-bit Color is scanning the paper and then it produces the exception See Additional context
To Reproduce
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- Go to '...'
- Click on '....'
- See error
Expected behavior
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scanning 4-bit Color should result the scanned document appears in Naps2
Screenshots
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Desktop (please complete the following information):
- OS: Ubuntu 24.04.3 LTS
- Naps2 Version 8.2.1.0
Additional context
Add any other context about the problem here.
Grpc.Core.RpcException: Status(StatusCode="Unavailable", Detail="failed to connect to all addresses")
at async Task GrpcDotNetNamedPipes.Internal.MessageReader.MoveNext(CancellationToken cancellationToken)
at async Task NAPS2.Remoting.Worker.WorkerServiceAdapter.Scan(ScanningContext scanningContext, ScanOptions options, CancellationToken cancelToken, IScanEvents scanEvents, Action<ProcessedImage, string> imageCallback)
This is the debug log:
2026-01-28 12:09:52.3010 5966 Scanning with ScanDevice { Driver = Sane, ID = brother4:net1;dev0, Name = *ADS-1100W (brother4), IconUri = , ConnectionUri = }
2026-01-28 12:09:52.3049 5966 Scan source: Feeder; bit depth: Color; dpi: 100; page size: 210x297 mm
2026-01-28 12:09:52.9381 9081 Opening SANE Device "brother4:net1;dev0"
2026-01-28 12:09:55.2556 9081 Option: 2 mode Scan mode Select the scan mode String None 30 SoftSelect, SoftDetect StringList Black & White,Gray[Error Diffusion],True Gray,24bit Color,24bit Color[Fast]
2026-01-28 12:09:55.2995 9081 Option: 3 resolution Scan resolution Sets the resolution of the scanned image. Int Dpi 4 SoftSelect, SoftDetect WordList 100,150,200,300,400,600,1200,2400,4800,9600
2026-01-28 12:09:55.3006 9081 Option: 4 source Scan source Selects the scan source (such as a document-feeder). String None 64 SoftSelect, SoftDetect StringList FlatBed,Automatic Document Feeder(left aligned),Automatic Document Feeder(left aligned,Duplex),Automatic Document Feeder(centrally aligned),Automatic Document Feeder(centrally aligned,Duplex)
2026-01-28 12:09:55.3014 9081 Option: 5 brightness Brightness Controls the brightness of the acquired image. Fixed Percent 4 SoftSelect, SoftDetect, Inactive Range -50-50/1
2026-01-28 12:09:55.3014 9081 Option: 6 contrast Contrast Controls the contrast of the acquired image. Fixed Percent 4 SoftSelect, SoftDetect, Inactive Range -50-50/1
2026-01-28 12:09:55.3014 9081 Option: 8 tl-x Top-left x Top-left x position of scan area. Fixed Mm 4 SoftSelect, SoftDetect Range 0-211,90000762951095/0,09999237048905166
2026-01-28 12:09:55.3022 9081 Option: 9 tl-y Top-left y Top-left y position of scan area. Fixed Mm 4 SoftSelect, SoftDetect Range 0-355,6/0,09999237048905166
2026-01-28 12:09:55.3022 9081 Option: 10 br-x Bottom-right x Bottom-right x position of scan area. Fixed Mm 4 SoftSelect, SoftDetect Range 0-211,90000762951095/0,09999237048905166
2026-01-28 12:09:55.3022 9081 Option: 11 br-y Bottom-right y Bottom-right y position of scan area. Fixed Mm 4 SoftSelect, SoftDetect Range 0-355,6/0,09999237048905166
2026-01-28 12:09:55.3073 9081 Maybe setting source
2026-01-28 12:09:55.3107 9081 Setting source to Automatic Document Feeder(left aligned)
2026-01-28 12:09:55.3119 9081 Maybe setting mode
2026-01-28 12:09:55.3122 9081 Setting mode to 24bit Color
2026-01-28 12:09:55.3161 9081 Maybe setting resolution
2026-01-28 12:09:55.3161 9081 Setting resolution to 100
2026-01-28 12:09:55.3197 9081 Maybe setting page-width
2026-01-28 12:09:55.3197 9081 Maybe setting page-height
2026-01-28 12:09:55.3200 9081 Maybe setting tl-x
2026-01-28 12:09:55.3200 9081 Setting tl-x to 0
2026-01-28 12:09:55.3200 9081 Maybe setting tl-y
2026-01-28 12:09:55.3200 9081 Setting tl-y to 0
2026-01-28 12:09:55.3200 9081 Maybe setting br-x
2026-01-28 12:09:55.3210 9081 Setting br-x to 210
2026-01-28 12:09:55.3210 9081 Maybe setting br-y
2026-01-28 12:09:55.3210 9081 Setting br-y to 297
2026-01-28 12:10:02.0571 5966 The worker process crashed. Grpc.Core.RpcException: Status(StatusCode="Unavailable", Detail="failed to connect to all addresses")
at async Task GrpcDotNetNamedPipes.Internal.MessageReader.MoveNext(CancellationToken cancellationToken)
at async Task NAPS2.Remoting.Worker.WorkerServiceAdapter.Scan(ScanningContext scanningContext, ScanOptions options, CancellationToken cancelToken, IScanEvents scanEvents, Action<ProcessedImage, string> imageCallback)
2026-01-28 12:10:12.0586 5966 Could not stop the worker process. It may have crashed.