Bug 1310658 - Can't login any more to F22 with kernel 4.3.4-200
Can't login any more to F22 with kernel 4.3.4-200
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
x86_64 Linux
unspecified Severity medium
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2016-02-22 07:42 EST by Roland Dirlewanger
Modified: 2016-05-23 07:19 EDT (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-05-23 07:19:11 EDT
Type: Bug
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Description Roland Dirlewanger 2016-02-22 07:42:01 EST
Description of problem:

Since I installed the last update of Fedora 22 on a Dell R620 or R610 server, it is not possible to login to the server, neither on the console nor with SSH.

SElinux is disabled on both servers

Version-Release number of selected component (if applicable):
kernel 4.3.4-200.fc22.x86_64

How reproducible:

Steps to Reproduce:
1. Boot Fedora 22 with kernel version 4.3.4 on a Dell R610 or R610 server without any window manager
2. Try to login on the console
3. Try to login with SSH

Actual results:
No login banner appears on the console : it just displays the "f" logo on a black screen. Connecting to the server with SSH blocks forever.

The problem does not show up when booting with previous the kernel (4.2.8-200).

Expected results:
Getting a login banner on the console
Getting a shell prompt when connecting to the server using SSH.

Additional info:

What I could observe :
- most (all ?) services are started on the server but there is no way to log on to it
- the command "ssh root@server bash" gives a shell without a prompt nor job control but helps to investigate further
- the command "ps ax | grep systemd" displays the following (note the D flag) :
  root         1  0.3  0.0  44156  5896 ?        Ds   13:15   0:02 /usr/lib/systemd/systemd --switched-root --system --deserialize 21
- systemctl seems to be broken. Trying to restart any service leads to this :
  systemctl restart httpd
  Failed to restart httpd.service: Connection timed out
- there's no way to reboot :
  Failed to start reboot.target: Connection timed out
Comment 1 Roland Dirlewanger 2016-05-23 07:19:11 EDT
The problem disappeared on both servers after the kernel was upgraded to 4.4.9.

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