Public bug reported:
Snap chromium loads fine but when I open print preview window and select
a USB connected printer and on the left I get a message that the printer
is unavailable for all installed printers. Syslog shows the following
error below. If I select the PDF printer, I get a print preview as
expected. If I install chromium from a 3rd party repo, I do not have
this problem and printing works.
2024-11-16T04:14:32.340887+00:00 hostname kernel: kauditd_printk_skb: 39
callbacks suppressed
2024-11-16T04:14:32.340930+00:00 hostname kernel: audit: type=1400
audit(1731730472.339:1550): apparmor="DENIED" operation="open" class="file"
profile="snap.chromium.chromium" name="/etc/cups/ppd/printer001.ppd"
pid=2189152 comm="ThreadPoolForeg" requested_mask="r" denied_mask="r"
fsuid=1003 ouid=0
2024-11-16T04:14:32.341776+00:00 hostname chromium_chromium.desktop[2189152]:
[2189152:2189152:1115/231432.341331:ERROR:device_event_log_impl.cc(201)]
[23:14:32.340] Printer: printer_capabilities.cc:235 Failed to get capabilities
for printer001, result: kFailed
I tried creating an override profile for apparmor but ran into
additional errors that prevented Chromium from loading so I gave up on
that.
I think if we can add the following to the snap.chromium.chromium
apparmor profile this would resolve the issue - /etc/cups/ppd/* path so
all files inside are allowed to read as well as /var/spool/cups/*.
If you have a working profile override that I can drop in with the two
paths I can try that.
Ubuntu 24.04 fully patched
apparmor/noble-updates,now 4.0.1really4.0.1-0ubuntu0.24.04.3 amd64
[installed,automatic]
chromium 130.0.6723.116 2993 latest/stable canonical✓ held
** Affects: chromium-browser (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2088333
Title:
Chromium - printer unavailable - apparmor denial
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