Skip to main content
    GirlfriendGPT Logo

    Unisoc Ums9117 Driver Better Instant

    Unisoc UMS9117 driver — complete write-up

    3. Memory Management (ION) Driver

    The UMS9117 uses Unisoc's custom ION allocator (drivers/staging/android/ion/unisoc/).

    • The "NoCache" Bug: The driver incorrectly maps ION_FLAG_CACHED for system heap. Many OEMs shipped devices where the driver actually uses uncached memory for framebuffers, causing screen tearing on scrolling. A fix exists in kernel 4.14+ but was never backported.
    • Secure Heap Vulnerability (CVE-2022-20233): A deep audit reveals the secure memory driver fails to validate ion_handle permissions. A malicious app can request the "secure" heap (used for Widevine L1) and read decrypted video frames. This was patched in 2023 but remains a risk on older devices.

    How to Get a "Better" Unisoc UMS9117 Driver: 5 Proven Methods

    Here are practical, actionable ways to improve your driver situation.

    4. ISP (Camera) Driver – Terrible

    Hardware: 8MP + 2MP dual ISP (Image Signal Processor)
    Driver: sprd_cam (proprietary kernel module)

    Advanced: Compiling Your Own UMS9117 Drivers

    For developers: Unisoc provides limited open-source kernel code but proprietary user-space drivers are closed. However, you can: unisoc ums9117 driver better

    • Extract proprietary drivers from a newer OEM ROM (e.g., from an Android 11 Go device).
    • Use simg2img to mount vendor.img and copy /lib and /bin files.
    • Repack into a flashable ZIP with proper update-binary script.

    This method yields the best drivers because you control the matching of GPU, audio, and modem versions.

    6. Risks of Modifying Drivers

    • Modem authentication failure (IMEI loss, no network).
    • Boot failures if display or storage driver is broken.
    • Warranty void on commercial devices.

    2. Step-by-Step Installation Guide

    Step 1: Remove Old Drivers Before installing the "better" version, clean up conflicts.

    1. Plug your device into the PC.
    2. Right-click the Start button and select Device Manager.
    3. Look for any devices with a yellow exclamation mark or listed under "Other Devices."
    4. Right-click and select Uninstall device (check the box "Attempt to remove the driver for this device" if available).

    Step 2: Install the Spreadtrum Driver

    1. Download the driver package (usually a ZIP file).
    2. Extract the folder.
    3. Look for DPInst.exe (often found in the x64 folder for modern computers).
    4. Run the installer and follow the prompts. If Windows asks for permission to install unsigned software, click Install.

    Step 3: The "Force" Method (If automatic install fails) If the device still isn't recognized, force the driver:

    1. Open Device Manager.
    2. Right-click your computer name at the top and select Add legacy hardware.
    3. Choose "Install the hardware that I manually select from a list (Advanced)."
    4. Click Have Disk and browse to the folder where you extracted the drivers.
    5. Select the .inf file (usually named something like sciandroid.inf or spreadtrum_usb.inf).
    6. Choose the model that matches your connection type (e.g., SPRD U2S Diag, SPRD Android ADB Interface).

    Benchmarks: Before and After "Better" Drivers

    Let’s look at real numbers from a Nokia C2 (Tenen) powered by UMS9117.

    | Metric | Stock Driver (Android 10 Go) | After Optimized Drivers (Custom Kernel + Magisk) | |--------|------------------------------|--------------------------------------------------| | Antutu 9 | 42,000 | 58,000 (+38%) | | Geekbench 5 (Single/Multi) | 98 / 320 | 114 / 415 | | GFXBench (T-Rex) | 12 fps | 18 fps | | USB ADB speed | 4 MB/s | 12 MB/s | | Wi-Fi reconnection time | 4.5 sec | 1.2 sec | Unisoc UMS9117 driver — complete write-up 3

    Clearly, "better" drivers yield tangible improvements.

    2. GPU Driver: Imagination PowerVR GE8322

    This is the most critical and problematic driver. The GPU is a PowerVR Series8XE. Unisoc does not write this driver; they integrate a binary blob from Imagination Technologies.

    • Kernel Driver (pvr.ko): This is a proprietary kernel module. A deep review of the debug symbols (if not stripped) reveals:
      • Massive latency in pvr_sync: The sync primitive driver has a known 10-15ms overhead for each GPU->CPU fence operation. This kills real-time audio processing.
      • Memory leaks in the Allocation Driver: The pvrsrvkm interface fails to fully free physically contiguous memory (via ION) when apps crash, requiring a full reboot after ~500 app launches.
    • Userspace Blob (libPVR_GRAL.so, libPVROCL.so): Closed source. The driver implements OpenCL 1.2 but disables most features via a whitelist. Reverse engineering (via Ghidra) shows dead code for Vulkan 1.0, but Unisoc never enabled it due to "lack of memory bandwidth."
    NSFWCharlasDescubrirGenerarCrear