![]() For the 1TB SSD this valued should be increased to 180000 instead. This parameter has to be set on the kernel command line.įor the Toshiba 512GB SSD used in some models of the XPS 13 the value to enable all states is 170000 (the combined latency of entering and leaving the highest power state, add nvme_fault_ps_max_latency_us=170000 to your kernel command line). This setting limit bus speed to 1,4GB/s instead of 3,8GB/s.įor some devices it might be necessary to set a higher value for the nvme_fault_ps_max_latency_us parameter to enable all power saving states. There is actually no know tricks to bypass this setting. Like Thunderbolt, Dell have limited in hidden UEFI settings the NVMe PCIE Bus to 2x instead of 4x (unofficially for energy saving reasons). When the laptop is undervolted, it is almost fanless most of time, excepted with high CPU/GPU usage (encoding, games.).Other known good options are enabled by default on 5.3+ kernel versions. The GPU can consume less power with the i915.enable_fbc=1 kernel module parameter (see Intel graphics#Module-based options for more details).If you downgrade from 2.14.2 and next updates, you have to factory reset your BIOS settings or you will continue to get "CPU (0): Values do not equal / GPU (1): Values do not equal / CPU Cache (2): Values do not equal".Įxample I5-7200U base stable value (tolerance to undervolting could be a little different for your same CPU): /etc/nf undervolt 0 'CPU' -153 It only work with 2.13.0 and previous bios update, because Dell has disabled it for security reasons. Each individual CPU requires manual tweaking - no well-known good values exist for any models, even for the same CPU model. It is possible to undervolt the CPU and GPU with intel-undervolt.The SD card adapter can be disabled in BIOS settings to save ~0.5W.It is possible to save around ~10/20% energy with some tricks. Reboot to Arch Linux and rerun the test.The tool gives you the option to disable CABC Then download and install this tool to update the panel firmware.In Windows, download and install the latest driver for the Intel Graphics controller.Boot the XPS 13 from your Windows 10 USB device (F12).Create a portable Windows 10 installation using woeusb. ![]() Download a Windows 10 ISO from Microsoft's website.It is possible to apply Dell's firmware update using a portable Windows 10 on a USB device: To test if your XPS 13 is affected by the CABC, go to this test page. Dell has issued a fix for this, however it is only available to run in Windows. While it saves a bit of power, it is generally undesirable, especially for Linux users who are likely to be switching between dark and light screen content. In the XPS 13 the display panels (both FHD and QHD+) come with Content Adaptive Brightness Control (usually referred to as CABC or DBC) embedded in the panel firmware - it adjusts the screen brightness depending on the content displayed on the screen. The laptop is available since October (pre-2017 model) in both a standard edition with Windows installed as well as a pre-2017 model and a 2017 model (with insignificant hardware differences) Developer Edition with Ubuntu installed. The Dell XPS 13 Late 2016 (9360) is the fourth-generation model of the XPS 13 line. So if your session crashes or if you lose the screen display, just turn the computer off and back on again, and you should regain full use of your LXDE desktop.Reason: Stub (Discuss in Talk:Dell XPS 13 (9360)) Here, the designation for the connected display for my laptop is LVDS-0.įor example, to reduce the overall screen brightness to 95% of maximum, use this command: xrandr -output LVDS-0 -brightness 0.95Īfter setting the screen brightness using this command, the brightness will be reset after you restart the computer. First, you have to find the device name of your monitor or other display. Right click the icon, then move the Display Brightness slider until the desired brightness is set.Īnother way to change the screen brightness in LXDE is with the command line tool xrandr. Now, the XFCE Power Manager icon should appear in the system tray to the right of the bottom panel. Then set System Tray Icon to On, as well. In the XFCE Power Manager dialogue box, click Handle Display Brightness Keys, and set it to On. Simply click the LXDE start button in the lower left-hand corner of the bottom panel, then click Preferences and Power Manager. One of the easiest ways to change the brightness settings in LXDE is by using the XFCE Power Manager. A lot of people use scripts to change these settings, but to me, that seems overly complicated and potentially hazardous. It’s isn’t obvious how to change some of the most basic settings in LXDE, such as screen brightness. ![]() However, it’s not necessarily the easiest to configure. LXDE is one of the fastest and lightest weight desktop environments available for Linux. ![]()
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