------- Comment From mauri...@br.ibm.com 2016-07-21 12:08 EDT-------
@adconrad,

> There were huge updates to the scsi_dh_alua driver in the 4.4.0-30 kernel.
> I can't see the LTC bug you referenced, so I can't tell if said updates
> address your issue, but I was hopeful. :P

Ok, I see. I'll ask if that helps w/ the other bug.

Nevertheless, having modprobe.blacklist working by default on the
installer would be interesting.

I passed around a sed line to use modprobe -b on hw-detect, a simple
workaround, but that definitely isn't  convenient (neither for preseed).
And since I don't know much of modprobe and its usage on the installer,
I decided to reach out for you guys first.

Now that is seems to be clear, can get hw-detect be updated to use
modprobe -b ?

Thanks!

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

Title:
  hw-detect modprobes blindly, ignoring blacklists

Status in linux package in Ubuntu:
  New

Bug description:
  == 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 <mauri...@br.ibm.com> / 
Lekshmi C. Pillai <lekshmi.cpil...@in.ibm.com> 
    
  ---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)

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