** Changed in: sane-backends
Status: Unknown => Fix Released
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Title:
Bightness and contrast settings have no effect
** Changed in: sane-backends (Debian)
Status: Confirmed => Fix Released
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Title:
Bightness and contrast settings have
This bug was fixed in the package sane-backends - 1.0.32-4ubuntu2
---
sane-backends (1.0.32-4ubuntu2) jammy; urgency=medium
* d/p/genesys-Enable-gamma-setting-when-contrast-or-brightness-.patch,
d/p/genesys-Store-contrast-and-brightness-adjustments-in-.patch:
- Fixes
** Changed in: sane-backends (Debian)
Status: Unknown => Confirmed
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Title:
Bightness and contrast settings have no
** Bug watch added: Debian Bug tracker #971725
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=971725
** Also affects: sane-backends (Debian) via
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=971725
Importance: Unknown
Status: Unknown
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@Pat: This issue got upstream's attention at last. The upstream fix
consists of two commits, and they apply fine in jammy (tested in the
PPA), but would require some work for focal.
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Thank you for doing that.
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Title:
Bightness and contrast settings have no effect
Status in sane-backends:
Unknown
Status
Agreed. Hopefully the merge request will encourage him to attend to the
issue. :)
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Title:
Bightness and contrast settings
Ideally, whoever wrote the original patch would be involved, because I
assume his gamma fix was pertinent to some piece of hardware available
to him, just happened to break the Canon LiDE scanners.
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Well, it's not my pipeline, it's upstream's ditto.
On 2021-02-17 06:41, Pat Suwalski wrote:
> genesys/low.cpp:636:76: error: unused parameter 'sensor' [-Werror
> =unused-parameter]
>
> You can either change the compiler flags or change the function
> signature from:
>
> bool
Just looking at the log, it seems that unused-parameter error is
enabled. I don't know how your pipeline works, but it's not dpkg-
buildpackage, so it makes sense that the default CFLAGS (or CXXFLAGS) is
set.
genesys/low.cpp:636:76: error: unused parameter 'sensor' [-Werror
=unused-parameter]
Thanks, that's what I thought (which is not exactly the same as in the
upstream issue...).
Anyway, I built for focal with that change in this PPA:
https://launchpad.net/~gunnarhj/+archive/ubuntu/sane-backends/+packages
That built successfully. However, the very same change in a fork of the
Sure, I used `dpkg-buildpackage -b``` to build it.
The change was just to remove the offending condition as was suggested:
diff -ur sane-backends-1.0.29.orig/backend/genesys/low.cpp
sane-backends-1.0.29/backend/genesys/low.cpp
--- sane-backends-1.0.29.orig/backend/genesys/low.cpp 2021-02-16
I see now that the change which is said to cause the issue was committed
on 2019-10-17 while 1.0.29 was released on 2020-02-02. So yes, it's
probably a mistake in the issue description.
I tried to apply the change proposed in the upstream issue, but it does
not compile: SCAN_FLAG_DISABLE_GAMMA
Hi Gunnar,
Perhaps there is a mistake in that report. I certainly witnessed it in
1.0.29 on Ubuntu 20.04 and 20.10. I don't think it was an issue before
that version, and it's unlikely to have been, as the revision that broke
it was put in October 17, 2019; not certain about which specific
Thanks for your research, Pat. However, on the upstream issue it's
stated that the problem is not present on sane-backends 1.0.29, while
you say you see it on Ubuntu 20.04 (which includes sane-backends
1.0.29). Are they different issues?
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: sane-backends (Ubuntu)
Status: New => Confirmed
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** Also affects: sane-backends (Ubuntu)
Importance: Undecided
Status: New
** Changed in: simple-scan (Ubuntu)
Status: Triaged => Invalid
** Also affects: sane-backends via
https://gitlab.com/sane-project/backends/-/issues/271
Importance: Unknown
Status: Unknown
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I have tracked the issue down to an upstream issue with sane-backends,
with a fix here:
https://gitlab.com/sane-project/backends/-/issues/271
This is not a simple-scan bug.
** Bug watch added: gitlab.com/sane-project/backends/-/issues #271
Here is some debug output when a scan is initiated.
The brightness and contrast values do seem to apply from the front-end:
[+16.68s] DEBUG: scanner.vala:1674: Scanner.scan
("genesys:libusb:001:010", dpi=600, scan_mode=ScanMode.GRAY, depth=2,
type=single, paper_width=2159, paper_height=2794,
Like Michael in #17, I noticed that since around 20.04 my Canon LiDE 35
has no brightness-contrast control, making simple-scan unusable for me.
I've worked around by using other software, but it's starting to bug me
as more stuff needs to be submitted online in today's world.
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I have the same Problem with my LiDE 60 like Michael.
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Title:
Bightness and contrast settings have no effect
Status in
After updating to Mint 20, I have the same issue with my Lide 60. It
worked before, and now brightness and contrast settings are ignored.
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I have the CanonScan LiDE 60 Scanner which I've had for a very long
time. The SimpleScan software always worked great out of the box with
this scanner...until I upgraded to Ubuntu 20.04. And now, neither the
brightness nor the contrast sliders have any effects on my scans.
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It is only an issue with the out of the box drivers, installing the proper
Epson drivers and importantly, configuring the Network Plugin, solves the
matter for me.
http://download.ebz.epson.net/man/linux/imagescanv3_e.html#sec6-1
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I can confirm this issue with Epson Workforce WF-2835.
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Title:
Bightness and contrast settings have no effect
Status in
I have the same problem. I am using Simple Scan 3.28.0 with a Canon
PIXMA 2522 printer/scanner. The lighter/darker and contrast sliders do
nothing. Printing is fine.
I have swapped the PIXMA with a Canon LIDE60 flatbed scanner and the
sliders work perfectly.I have also downloaded ScanGear from
And someone has that problem here: https://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=920216
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Title:
Bightness and contrast
Same here. Canon MX395,
Ubuntu Bionic, Sane over network,
Simple Scan: 3.28.0 and 3.32.0 - both no effect on those setting.
Skanlite do work.
** Bug watch added: Debian Bug tracker #920216
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=920216
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Same issue in Brother MFC-J470DW: brightness and contrast settings have no
effect.
Xubuntu 16.04 LTS 4.4.0-128-generic #154-Ubuntu SMP i686
Simple Scan 3.20.0
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I cannot confirm this in bionic with a Canon LiDE 35.
If you are still affected in bionic or later, please speak up.
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Title:
I have the same issue on an HP Photosmart C4795. As mentioned, xsane
works just fine.
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Title:
Bightness and contrast
As reported at Bug #1340161 the problem is solved for a Canon LiDE 110
scanner using Ubuntu 16.04 and simple-scan 3.20.0=0ubuntu1
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Hello,
Same problem for me with Canon MP550 (scanner + printer) with Ubuntu Gnome
16.10.
Regards.
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Title:
Bightness and
** Tags added: trusty yakkety
** Changed in: simple-scan (Ubuntu)
Status: Incomplete => Triaged
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Title:
Bightness
Sorry for the late response.
I tested today's cdimage (daily-live).
Unfortunately, the issue has not changed.
Still: Brightness and contrast settings have no effect.
(Tested with the same old scanner "Canon, Inc. CanoScan N1240U/LiDE 30".)
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Heiko L, thank you for reporting this and helping make Ubuntu better.
To see if this is already resolved, could you please test
http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?
** No longer affects: simple-scan (Ubuntu)
** Project changed: simple-scan => simple-scan
I can confirm the problem on this scanners:
Canon Lide 25 (Flat bed scanner
Canon MX 925 (Multi function device)
Simple Scan is great and easy to use. But i miss good scan results for
color-scans.
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: simple-scan (Ubuntu)
Status: New = Confirmed
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Scanner: Acer Acerscan 620S, SCSI scanner
Ubuntu 14.04, Simple Scan version 3.12.1
Same here.
In xsane and gscan2pdf brightness and contrast do work.
Adding as attachment an error-log
** Attachment added: simple-scan.log
** Tags added: brightness contrast
** Also affects: simple-scan
Importance: Undecided
Status: New
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Title:
As reported in Bug #1340161 (marked as duplicate), the same problem
happens with the following scanners:
-Canon Canoscan LIDE 110 (thanks Rik Shaw )
-Canon CanoScan 9000F Mark II (thanks Alexandre (ipipomme) )
** Changed in: simple-scan
Status: New = Confirmed
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