Bug 927137 – net-print/libcupsfilters-2.0.0: partially break printing colored data on a B/W printer using IPP Everywhere

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Tobias Leupold 2024-03-16 11:05:33 UTC]

Dear devs,

the recent update from net-print/cups-filters-1.28.17-r2 to net-print/cups-filters-2.0.0 broke color printing, as least for my printer (Brother HL-L2370DN).

I see the same problem on my Artix notebook, so I think this is actually an upstream issue, not a Gentoo-specific one. I already filed an upstream bug report with scans showing the problem at https://github.com/OpenPrinting/cups-filters/issues/578 .

Masking net-print/cups-filters-2.0.0 and downgrading to 1.28.17-r2 fixes the problem here.

So: Please don't remove v1.28.17-r2 from the tree until this issue is resolved ... Thanks a lot!

Cheers, Tobias

[Comment 1 Sam James 2024-03-16 11:06:54 UTC]

Thank you!

[Comment 2 Tobias Leupold 2024-03-28 06:56:51 UTC]

This actually has already been fixed upstream, but there's no new release yet. The issue has been moved to libcupsfilters, which do cause this.

Three patches have been mentioned there:

https://github.com/OpenPrinting/libcupsfilters/commit/c6175a2f.patch
https://github.com/OpenPrinting/libcupsfilters/commit/107091186.patch
https://github.com/OpenPrinting/libcupsfilters/commit/78cc6758.patch

For c6175a2f.patch, I had to remove the first hunk to make it work, but this was only a whitespace chance. The rest and the other two worked as-is.

After rebuilding libcupsfilters and restartting cupsd, my printer worked as before the update.

I don't know when they will do a bugfix release. But this is serious breakage. Maybe, this would be worth a -r4 ebuild from Gentoo's side?

[Comment 3 Larry the Git Cow 2024-04-08 16:34:31 UTC]

The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c0d3a113d5842f182fb13f51e011a83bcfe791fe

commit c0d3a113d5842f182fb13f51e011a83bcfe791fe
Author:     Sam James <[e-mail]>
AuthorDate: 2024-04-08 16:33:06 +0000
Commit:     Sam James <[e-mail]>
CommitDate: 2024-04-08 16:34:19 +0000

    net-print/libcupsfilters: backport color vs. b/w fixes
    
    Closes: https://bugs.gentoo.org/927137
    Signed-off-by: Sam James <[e-mail]>

 .../files/libcupsfilters-2.0.0-color-space.patch   | 254 +++++++++++++++++++++
 .../libcupsfilters-2.0.0-raster-build-fix.patch    |  28 +++
 .../files/libcupsfilters-2.0.0-raster-gray.patch   |  50 ++++
 .../libcupsfilters/libcupsfilters-2.0.0-r4.ebuild  |  77 +++++++
 4 files changed, 409 insertions(+)

[Comment 4 Tobias Leupold 2024-04-08 18:08:28 UTC]

Works fine. Thanks for including this :-)

[Comment 5 Sam James 2024-04-10 03:08:49 UTC]

Thanks!