April 10, 2026
Sticker wars and battery scares
Installing OpenBSD on the Pomera DM250{,XY?}
Turn your cute Pomera into a hacker notebook—fans swoon, skeptics warn
TLDR: OpenBSD lands on Japan-only Pomera DM250/X/XY with a risky, custom setup (and not for the US model), promising a hackable writing gadget. Comments split between nostalgia for a clean, simple system and gripes about C-heavy security choices—plus hilarious fights over keyboard stickers and the device’s finicky battery.
OpenBSD just slid onto the adorable Pomera DM250 e‑writer, and the guide comes with big, flashing RISK signs: custom boot files, possible battery weirdness, and a hard no on the U.S. model. The post details the how‑to and even links backup tools at EKESETE.net. In the comments, vibes swung between nostalgia and nail‑biting. One fan, altairprime, practically hugged their keyboard, longing for the Sony Vaio days and craving “a familiar editing environment” on this cute clamshell. The subplot? A surprisingly spicy sticker saga: swap the keyboard layout in software or peel those U.S. stickers—keyboard nerds clutch tweezers; everyone else clutches popcorn.
Then came the sober dad‑take from sidkshatriya: OpenBSD’s charm is a small, understandable system with real simplicity and a track record on new chips—chef’s kiss for minimalists. But the quibbles drew sparks: if it’s so security‑first, why is so much still written in the C language, and are some security add‑ons actually worth the hassle? Meanwhile, the battery’s “boss fight” status turned into meme fuel—drain it and you could be stuck in boot limbo. Net result: a split crowd—romantics turning a digital notepad into a hacker’s diary, and pragmatists asking whether this is a cozy upgrade or a weekend warranty thriller.
Key Points
- •The guide covers installing OpenBSD-current on Japanese-model Pomera DM250, DM250X, and DM250XY using custom U-Boot and kernel images.
- •Users are warned not to apply these instructions to the DM250US (US-model) due to differing hardware (charging chip and keyboard layout).
- •A full eMMC backup is recommended prior to changes, using tools from EKESETE.net.
- •Factory recovery can be triggered by pressing Right Shift + Left Alt at power-on, booting a recovery Linux kernel and initramfs that can run _sdboot.sh from an SD card.
- •Writing a new U-Boot to eMMC blocks booting the original Linux or recovery; restoring requires EFI boot to rewrite the backup U-Boot, and the device has specific power/charging caveats including not fully powering off with USB-C connected and risks if the battery fully drains.