GoKawiilNew open-source DRM driver brings full HDMI support to Silicon Motion SM750 card
A developer released sm750hdmifb, an experimental Linux DRM driver specifically for the SE-DP750A-HDMI PCIe card built around the Silicon Motion SM750G10-AC GPU and SiI9024ACNU HDMI transmitter. It enables true 2048-wide output or a scaled 2560x1080 ultrawide desktop with more efficient colour conversion and update handling than the older sm750fb kernel driver it replaces.
GoKawiil's interpretation of the reporting above, not reported fact.
Legacy graphics chips like the SM750 often get abandoned by upstream Linux support, leaving niche hardware stuck with poor display quality or unmaintained drivers. This community-built driver shows how open source can extend the useful life of specialized industrial or embedded GPUs by exposing modern DRM capabilities that vendors never bothered to implement.
- Only the specific SE-DP750A-HDMI board with an SiI9024ACNU transmitter is supported, not all SM750-based cards
- Installation requires Linux 6.17 or newer and a reboot to blacklist the old sm750fb driver
- Non-EDID modes are experimental and can cause display instability, so a recovery method like SSH is recommended
Cable Matters HDMI to HDMI Cable — If you're bringing an SM750 HDMI card to life with this new open source Linux driver, you'll want a solid HDMI cable to actually get the picture out. A reliable braided high-speed cable from Cable Matters is an easy way to rule out the cable when you're debugging odd modes and no-signal situations.
See Cable Matters HDMI to HDMI Cable on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: github.com, 2026-08-30
Published there as: “Why open source rocks – a new SM750 (Silicon Motion GPU) HDMI Driver”
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