Add linux-on-yoga-7x-snapdragon post

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+title = "Ubuntu Linux on Snapdragon X Laptop (Lenovo Yoga Slim 7x)"
+date = 2024-12-01T11:17:03+10:00
+# template = "yoga7x.html"
+
+# [extra]
+# updated = 2024-07-26T10:34:50+10:00
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+
+{{ figure(image="posts/2024/linux-on-yoga-7x-snapdragon/fastfetch.png",
+   link="posts/2024/linux-on-yoga-7x-snapdragon/fastfetch.png",
+   resize_width=1600,
+   alt="Screenshot of fastfetch output in a terminal window. The details indicate that it's running Ubuntu oracular 24.10 on aarch64.",
+   caption="Ubuntu running on Yoga Slim 7x") }}
+
+Over the course of the last few months some fine folks in the Linux community
+have been plugging away implementing support for Qualcomm Snapdragon X based
+ARM laptops. Recently Canonical published [Ubuntu 24.10
+Concept][ubuntu-concept] for testing on these laptops, which I
+installed and tested on my Lenovo Yoga Slim 7x.
+
+<!-- more -->
+
+### Installation
+
+Installation alongside Windows was almost as straightforward as a normal Ubuntu
+install. It booted to a graphical live environment with working Wi-Fi.
+
+The main issue was that the installer application in the live environment was only
+rendering the bottom quarter of its window when display scaling was set to 200%
+(which is the expected value for the display and was automatically applied at
+boot). Changing it to 100% made everything tiny, but allowed me to complete the
+install.
+
+As per the notes in the forum post I installed and ran `qcom-firmware-extract`
+after installation to fetch and install firmware blobs from the Windows
+partition, and then rebooted. This appeared to fix battery level reporting and
+possibly hardware video acceleration.
+
+{{ figure(image="posts/2024/linux-on-yoga-7x-snapdragon/qcom-firmware-extract.png",
+   link="posts/2024/linux-on-yoga-7x-snapdragon/qcom-firmware-extract.png",
+   resize_width=1600,
+   alt="Screenshot of a terminal showing the output from running qcom-firmware-extract. It says 'extracting firmware' followed by a list of files, and ends with 'Building package qcom-x1e-firmware-extracted_20241201_arm64'.",
+   caption="Running qcom-firmware-extract") }}
+
+### Usage
+
+{{ figure(image="posts/2024/linux-on-yoga-7x-snapdragon/system-details.png",
+   link="posts/2024/linux-on-yoga-7x-snapdragon/system-details.png",
+   resize_width=1600,
+   alt="Screenshot of System Details in GNOME settings indicating that GNOME is running on a Lenovo Yoga Slim 7 14Q8X9 with 32Gb RAM, 1Tb disk, GNOME 47 on Wayland. The Processor section is blank.",
+   caption="System Details in GNOME Settings") }}
+
+I have not spent a huge amount of time with this installation as Ubuntu isn't my
+distro of choice, so I don't want to invest much time setting it up. I did
+try most common functionality to get an idea of what works though.
+
+#### Wi-Fi
+
+I was about to connect to my 5Ghz AP without issue. A [speed test] showed very
+similar results between Windows and Linux (although Linux was a bit faster):
+
+- Linux: 137 Mbps down, 47 Mbps up
+- Windows: 131 Mbps down, 45 Mbps up
+
+#### Bluetooth
+
+I was able to pair and use some Sennheiser Bluetooth headphones.
+
+#### Graphics
+
+The display works fine. I was able to change it to run at the full 90Hz in the
+GNOME settings. The Wayland based GNOME desktop appears to be using GPU
+acceleration and runs smoothly.
+
+{{ figure(image="posts/2024/linux-on-yoga-7x-snapdragon/glxgears.png",
+   link="posts/2024/linux-on-yoga-7x-snapdragon/glxgears.png",
+   resize_width=1600,
+   alt="Screenshot showing glxgears running and reporting 89fps in the terminal.",
+   caption="glxgears running at 90Hz") }}
+
+[glxinfo](glxinfo.txt) and [vulkaninfo](vulkaninfo.txt) both suggest hardware
+graphics acceleration is available. However, Firefox reports `llvmpipe` in
+`about:support` and drops frames playing 4K 60Hz video on YouTube, same with
+Chromium. Despite `llvmpipe` Firefox runs smoothly.
+
+It appears that hardware video decoding via is not supported yet (`vainfo`
+doesn't find a suitable device).
+
+#### Audio
+
+The built-in speakers didn't work, with the only output device being a dummy device.
+However, pairing Bluetooth headphones worked as expected. I didn't test microphones.
+
+#### Input Devices
+
+The keyboard and trackpad work, including tap-to-click out of the box on the
+trackpad. The brightness and volume controls work on the keyboard.
+
+#### Power Management
+
+As mentioned above, installing and running `qcom-firmware-extract` copies
+firmware from the Windows installation and fixed battery level reporting. I
+can't comment on battery life yet but it did seem to run a bit warmer than
+Windows, although not as hot as
+[my early testing of OpenBSD](@/posts/2024/yoga-7x-snapdragon-developer-review/index.md#non-windows-operating-systems).
+
+#### Other
+
+I didn't try the USB ports. Suspending _appeared_ to work: the screen turned
+off, however the LED on the power switch did not start pulsing like it does in
+Windows. More testing required here.
+
+### Conclusion
+
+Linux support for these laptops is coming along quite nicely, and if you're
+willing to put up with a few rough edges Ubuntu is quite usable. No doubt
+things will continue to improve.
+
+There's been working happen in other distros too. Relevant to my interests
+[Jami Kettunen has also being working on X1E support in Chimera Linux][JamiKettunen]
+and has that running on a HP OmniBook X. It's on my TODO list to try out Jami's
+work on my Yoga 7x.
+
+{{ figure(image="posts/2024/linux-on-yoga-7x-snapdragon/chimera-kde-plasma-x1e.png",
+   link="posts/2024/linux-on-yoga-7x-snapdragon/chimera-kde-plasma-x1e.png",
+   resize_width=1600,
+   alt="About this system in KDE Plasma showing Chimera Linux running on Snapdragon X hardware.",
+   caption="About this system in KDE Plasma showing Chimera Linux running on Snapdragon X hardware.") }}
+
+
+[JamiKettunen]: https://github.com/JamiKettunen/cports/tree/x1e
+[ubuntu-concept]: https://discourse.ubuntu.com/t/ubuntu-24-10-concept-snapdragon-x-elite/48800/1
+[speed test]: https://www.speedtest.net/