Public bug reported:

== Comment: #0 - Mauricio Faria De Oliveira - 2016-07-11 18:47:59 ==
---Problem Description---
modprobe does not honor blacklist options in kernel cmdline unless -b is used 
(at least on the installer)

The modprobe.blacklist option is required as a work-around until a solution to 
a device-driver bug is found (IBM LTC bug 138273).
 
I've gone through the code of the kmod src pkg, but didn't spot anything 
obvious.
Passing along to the Ubuntu team.

Contact Information = Mauricio Faria de Oliveira <[email protected]> / 
Lekshmi C. Pillai <[email protected]> 
  
---Steps to Reproduce---
 Boot the installer w/ this boot/kernel cmdline option (the alias w/ dashes is 
not required, but is here just in case):
    modprobe.blacklist=scsi_dh_alua,scsi-dh-alua    

On the dialog for username/password, select Go Back, then Exit to shell:

The blacklist is detected/present in the config:

~ # modprobe -c | grep alua
blacklist scsi_dh_alua
blacklist scsi-dh-alua

But the module is insmod-ed anyway:

~ # modprobe -v -n scsi-dh-alua
insmod 
/lib/modules/4.4.0-21-generic/kernel/drivers/scsi/device_handler/scsi_dh_alua.ko
 

Unless -b is used:

~ # modprobe -v -n -b scsi-dh-alua
~ #

Installer kernel:
[    0.000000] Linux version 4.4.0-21-generic (buildd@bos01-ppc64el-017) (gcc 
version 5.3.1 20160413 (Ubuntu/IBM 5.3.1-14ubuntu2) ) #37-Ubuntu SMP Mon Apr 18 
18:30:22 UTC 2016 (Ubuntu 4.4.0-21.37-generic 4.4.6)

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-143679 severity-high 
targetmilestone-inin16041

** Tags added: architecture-ppc64le bugnameltc-143679 severity-high
targetmilestone-inin16041

** Changed in: ubuntu
     Assignee: (unassigned) => Taco Screen team (taco-screen-team)

** Package changed: ubuntu => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1602717

Title:
  modprobe does not honor blacklist options in kernel cmdline unless -b
  is used (at least on the installer)

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