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Last modified by Tobias Wintrich on 2026/07/22 09:49
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1 A customer has reported boot errors after updating to a RangeeOS version newer than 13.00 Build 165 on their HP 260 G1 DM.
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3 The errors can manifest in different ways. In most cases, the boot screen freezes after a few minutes and the desktop does not start.
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5 The cause is a stricter check of the default behavior of the Intel IOMMU. This now checks for correct functionality. If this check fails, some components cannot be initialized correctly. There is presumably a BIOS bug here that causes the IOMMU to not be used correctly. However, as long as you do not intend to virtualize anything on the hardware, this is not a major issue and the function can be disabled.
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7 = Booting the device in the error state (one-time) =
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9 If a device is already in the error state, it must be booted once via a manual change in order to then permanently disable the option via the Kommbox. Proceed as follows:
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11 (% class="box infomessage" %)
12 (((
13 If you have disabled the boot menu via configuration, the only option at this point is to reinstall the device:
14 [[RangeeOS - Installation from a USB stick>>doc:HowTos.USB-Installer.WebHome]]
15 )))
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17 1. Stop the boot menu by repeatedly pressing the **Down arrow key**.
18 1. Select the **Boot** entry and press the **e** key on your keyboard.
19 1. Navigate to the end of the line that begins with "linux $bzImage......" (the **END** key takes you immediately to the end of the line).
20 1. Add this parameter here:
21 intel_iommu=off
22 1. Then start the OS with CTRL+X and configure the option in the Kommbox.
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24 = Setting the option via the Kommbox =
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26 Once you have rebooted the device, you can configure this option in the Kommbox:
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28 Under **System** -> **Bootloader**, set the option **intel_iommu** to **off** (the [[Expert Mode>>doc:Handbuecher.Rangee Thin Client Admin Guide 13\.00.Kapitel 2 - Kommbox.2\.C System.2\.C\.M Expertenmodus.WebHome]] must have been enabled in the top right for this).
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30 You can also safely distribute this option to all devices in your TCMS.