linux-kernel - Re: [PATCH v2] i2c: i801: blacklist Host Notify on HP EliteBook G3 850

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Date:   Tue, 3 Apr 2018 21:13:26 +0200
From:   Andreas Radke <andyrtr@...hlinux.org>
To:     Jason Andryuk <jandryuk@...il.com>
Cc:     Jean Delvare <jdelvare@...e.com>, Wolfram Sang <wsa@...-dreams.de>,
        benjamin.tissoires@...hat.com, aduggan@...aptics.com,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] i2c: i801: blacklist Host Notify on HP EliteBook G3
 850

Am Mon,  2 Apr 2018 08:34:35 -0400
schrieb Jason Andryuk <jandryuk@...il.com>:

> The HP EliteBook G3 850 has a weird bug where a subsequent cold boot
> hangs while plugged in if Linux enables the Host Notify features of
> i2c-i801.  The cold boot hang depends on how the system boots.  It
> does not hang on UEFI Grub text boot or legacy Grub text boot.  But
> it does hang on legacy Grub graphical boot and Intel Boot Agent PXE
> text boot. Booting unplugged is not affected.
> 
> Disabling the Host Notify feature with disable_feature=0x20 works
> around the bug, so automatically do so based on DMI information.
> 
> More information can be found here:
> https://www.spinics.net/lists/linux-i2c/msg33938.html

I'm faced with similar cold boot issues on my HP ProBook 430 G4 model.
Trying your hint with adding 
"options i2c_i801 disable_features=0x20"
to /etc/modprobe.d/i2c_i801.conf doesn't seem to solve it for me.

root@...top64:/root # systool -v -m
i2c_i801 Module = "i2c_i801"

  Attributes:
    coresize            = "28672"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "0"
    srcversion          = "A40BF457CFB8C7887EB2045"
    taint               = ""
    uevent              = <store method only>

  Parameters:
    disable_features    = "32"

  Sections:
    .bss                = "0xffffffffc0801800"
    .data               = "0xffffffffc0801120"
    .exit.text          = "0xffffffffc07fe463"
    .gnu.linkonce.this_module= "0xffffffffc08014c0"
    .init.text          = "0xffffffffc070b000"
    .note.gnu.build-id  = "0xffffffffc07ff000"
    .orc_unwind         = "0xffffffffc0800140"
    .orc_unwind_ip      = "0xffffffffc07ffe38"
    .parainstructions   = "0xffffffffc07ff548"
    .rodata.str1.1      = "0xffffffffc07ff284"
    .rodata.str1.8      = "0xffffffffc07ff028"
    .rodata             = "0xffffffffc07ff560"
    .smp_locks          = "0xffffffffc07ff280"
    .strtab             = "0xffffffffc070d350"
    .symtab             = "0xffffffffc070c000"
    .text               = "0xffffffffc07fc000"
    __jump_table        = "0xffffffffc0801000"
    __mcount_loc        = "0xffffffffc08005d0"
    __param             = "0xffffffffc07ffe10"
    __verbose           = "0xffffffffc0801220"

My system boots legacy grub in text mode (KMS) and seems to keep hanging
even with that option set.

Do you have any further idea?

-Andy
Arch linux

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