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[[!meta title="Known issues"]]
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Some machines have been reported to have problems starting Tails.

This list might not be accurate nor complete.

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[[!toc levels=2]]
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Problems starting Tails
=======================
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Apple hardware
--------------

For the moment, Tails has a very limited support for Apple hardware.

Most recent Apple hardware does not boot without UEFI, and currently
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Tails does not start with UEFI. See [[!tails_todo UEFI desc="the corresponding ticket"]].
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See also [[manual USB installation with
Mac|doc/first_steps/manual_usb_installation/mac]] for more compatibility
reports, as well as [[!tails_bug
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Some_old_Macbooks_running_Lion_10.7_not_booting_Lion..can_we_get_booting_fixed___63__
desc="this bug report"]].
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Dell Inc. Latitude E6430/0CPWYR
-------------------------------

Do not start on USB sticks created using Tails USB Installer.

With BIOS versions A03 06/03/2012

Error message: `Invalid partition table!`

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Dell XPS L702X/03RG89, Samsung RV520
------------------------------------
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Do not start on USB sticks created using Tails USB Installer.

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We were reported that the legacy BIOS shipped on these systems doesn't
know how to deal with the GPT partition scheme installed by Tails
USB Installer.
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<http://en.community.dell.com/support-forums/laptop/f/3518/p/19392884/20010995.aspx>

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Dell Inspiron 8100
------------------

The display panel will have the wrong resolution unless `video=LVDS-1:1600x1200
nouveau.noaccel=1` is added to the boot command line.

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Dell Dimension 2400
-------------------

Cannot start neither from USB nor from DVD. System crashes with a blank
screen and locked up keyboard.

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ThinkPad X220, T520 and E325
----------------------------
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See the corresponding [[!tails_bug ThinkPad_X220_vs_GPT desc="ticket"]].
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ASUSTeK G75VW
-------------

Since Tails 0.17.1 starts all right with "failsafe" mode but not
otherwise.

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Security issues
===============
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Tails may not erase all the system memory on shutdown
-----------------------------------------------------

On rare systems (non-PAE with big amounts of memory),
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Tails does not consistently [[!tails_todo
more_efficient_memory_wipe desc="erase all system memory as it
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should"]].
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After using the Tails USB installer, the "emergency shutdown" doesn't work.
---------------------------------------------------------------------------
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The Tails USB installer messes a bit too much with the USB devices for the
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"emergency shutdown on media removal" feature to continue working after using
it. If you believe this feature is critical for the session you're running, we
advice you to reboot Tails.
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Tails DVD eject failure
-----------------------

Pressing the DVD eject button does not trigger emergency shutdown.
Also, the "normal" (non-emergency) shutdown procedure does not eject
the DVD anymore.

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(Ticket: [[!tails_todo fix_DVD_eject_at_shutdown]])
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Stream isolation inconsistency in Claws Mail
--------------------------------------------

Claws Mail isn't using its dedicated Tor SocksPort for Tor hidden
service IMAP/POP/SMTP servers (instead Tor's TransPort is used). This
is just a deviation from Tails' design and should have no adverse real
world consequences.
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Tails fails to completely shutdown or restart
---------------------------------------------

When stopping Tails on some hardware, the memory wipe procedure fails to
complete: the display gets scrambled, but the computer doesn't
completely shutdown or restart. Sometimes the caps-lock button light of
the keyboard flashes.

<div class="caution">
When this happen, there is no guarantee that the memory is wiped entirely.
</div>

This issue has been reported on the following hardware:

  - Hewlett-Packard HP Pavilion dv6 Notebook PC
  - Lenovo ThinkPad X61, only on emergency shutdown when pulling out the
    USB stick
  - Toshiba Satellite C855D
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  - Dell Inc. Studio 1458
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<a id="fingerprint"></a>

Fingerprint
===========

<!-- If this section is empty adjust the [[fingerprint documentation|doc/about/fingerprint]]. -->

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Tails and TBB report different DOM storage support
--------------------------------------------------
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Some websites use [[!wikipedia DOM storage]] if available in the
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browser. Tails browser does not allow DOM storage yet, while the TBB
does (probably safely). This difference can be used to distinguish
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Tails users from TBB users. This [[!tails_todo
iceweasel_DOM_storage_isolation desc="will be fixed"]] in a future
release of Tails.
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Tails does not handle image cache the same way as TBB
-----------------------------------------------------

The latest and greatest TBB isolates image cache to URL bar domain.
Tails does not do so yet. This difference can be used to distinguish
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Tails users from TBB users. This [[!tails_todo
iceweasel_image_cache_isolation desc="will be fixed"]] in a future
release of Tails.
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Other issues
============

Connecting to FTP servers is not possible
-----------------------------------------

Public FTP servers on the Internet are not reachable using Tails.
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See [[!tails_todo fix_Internet_FTP_support desc="the corresponding
task"]] for more details.
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YouTube video are hard to get
-----------------------------

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[[!tails_todo easier_YouTube desc="HTML5 video are not easily seen on YouTube"]]. When the
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message *This video is currently unavailable* appears, the video can actually be viewed.
Right-click on the page, select **NoScript** → **Blocked objects** and
**Temporarily allow…** the video.

Tails will never support videos which requires Flash (those with ads).

"Connect automatically" for NetworkManager connections isn't persistent.
------------------------------------------------------------------------

When the "Network Connections" persistence feature is
activated, the "Connect automatically" settings isn't saved for any
connection.  While this is a bug, it's actually a good
one. NetworkManager itself enables this option by default for all new
connections, and could result in users re-connecting to a previous network at
times when they don't want that.

Tails fails to connect to certain Wi-Fi networks
------------------------------------------------

This may be related to the introduction of wireless regulation support
in Tails 0.13.
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Tails could behave better when run inside VirtualBox
----------------------------------------------------

Since 0.17.1, VirtualBox guest modules are no shipped anymore.

See [[!tails_todo fix_virtualbox_guest_modules_build desc="the
corresponding task"]] for details.