[Bug 857175] [NEW] i2c-i801 kernel module needlessly blacklisted

Fri Sep 23 08:53:34 UTC 2011

Public bug reported:

I recently got an old but still very nice Thinkpad T41 with 1.5GB RAM.

'decode-dimms' can't see the DRAM EEPROMs without the i2c-i801 kernel
module.  That module doesn't load automatically because it is
blacklisted in /etc/modprobe.d/blacklist.conf.  When I load it manually
with 'modprobe i2c-i801', everything works.  (I apparently have a 512MB
Samsung and a 1024MB Kingston, both PC2700.)

My Thinkpad T41 is not the only laptop to be hit by that blacklist (Fujitsu Esprimo Mobile U9200):
http://permalink.gmane.org/gmane.linux.drivers.i2c/9120

It seems to have been blacklisted because of a suspend issue on an HP Compaq NC6000 (Ubuntu bug #10306).
(For some reason that bug seems to be about apt?!  I have tried to find the original bug in Launchpad but I couldn't.)

I can confirm that suspend/resume works just as well with i2c-i801 loaded as without it, i.e. perfectly.
I can also confirm that hibernate/resume doesn't work without i2c-i801 loaded.  I haven't tested /with/ the module but I don't expect it to magically work /with/ the module when it doesn't /without/.

---

I used 'ubuntu-bug linux' to gather information about my system in case
you need it.

Also, I don't know if the bug should be assigned to 'lm-sensors' or
'linux' or maybe some other package: it affects the lm-sensors package
but it has to be fixed in the 'module-init-tools' package and the
i2c-i801.ko module is in 'linux-image-xxxx'.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-11-generic 2.6.38-11.48
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  firefly    1313 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with AD1981B at irq 11'
   Mixer name	: 'Analog Devices AD1981B'
   Components	: 'AC97a:41445374'
   Controls      : 26
   Simple ctrls  : 18
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 1RHT71WW-3.04'
   Mixer name	: 'ThinkPad EC 1RHT71WW-3.04'
   Components	: ''
   Controls      : 2
   Simple ctrls  : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 14
   Mono: Playback 4 [29%] [on]
Date: Fri Sep 23 10:39:30 2011
HibernationDevice: RESUME=UUID=68922f2a-191d-4238-9599-527a901f0025
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: IBM 23747FG
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=f2a2e3e5-02ac-4496-aa79-c131d2a91066 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-11-generic N/A
 linux-backports-modules-2.6.38-11-generic  N/A
 linux-firmware                             1.52
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/29/2004
dmi.bios.vendor: IBM
dmi.bios.version: 1RETDHWW (3.13 )
dmi.board.name: 23747FG
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1RETDHWW(3.13):bd10/29/2004:svnIBM:pn23747FG:pvrThinkPadT41:rvnIBM:rn23747FG:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 23747FG
dmi.product.version: ThinkPad T41
dmi.sys.vendor: IBM

** Affects: lm-sensors (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: apport-bug i386 natty

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Title:
  i2c-i801 kernel module needlessly blacklisted

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