// After (fixed) static int lpro_probe(struct platform_device *pdev) // ... allocate ramdisk ... ret = device_register(&lpro_device); if (ret) dev_err(&pdev->dev, "Failed to register device\n"); return ret;
# Ubuntu sudo apt install linux-image-generic-hwe-22.04 sudo dnf upgrade kernel Arch sudo pacman -S linux-lts
// Before (buggy) static int lpro_probe(struct platform_device *pdev) // ... allocate ramdisk ... // Missing: device registration return 0;
Edit your bootloader (GRUB or systemd-boot) and append:
find /lib/modules/$(uname -r) -name "*lpro*" -o -name "*aio*ram*" The error often occurs because the initramfs lacks LPRO modules. Rebuild it:
Last updated: May 2026 – Compatible with Linux kernels 5.4 through 6.12.
lpro.mem=256M # Allocate 256 MB for LPRO ramdisk aio=legacy # Use legacy AIO (if supported) memmap=128M$0x2000000 # Reserve contiguous memory For GRUB, edit /etc/default/grub and add to GRUB_CMDLINE_LINUX_DEFAULT , then run sudo update-grub . Older kernels (before 5.4) had spotty AIO ramdisk support, especially for custom drivers. Upgrade to a newer long-term support (LTS) kernel:
lsmod | grep -i lpro lsmod | grep -i aio_ramdisk If nothing appears, load the module manually:
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// After (fixed) static int lpro_probe(struct platform_device *pdev) // ... allocate ramdisk ... ret = device_register(&lpro_device); if (ret) dev_err(&pdev->dev, "Failed to register device\n"); return ret;
# Ubuntu sudo apt install linux-image-generic-hwe-22.04 sudo dnf upgrade kernel Arch sudo pacman -S linux-lts
// Before (buggy) static int lpro_probe(struct platform_device *pdev) // ... allocate ramdisk ... // Missing: device registration return 0; lpro aio ramdisk device not registered better
Edit your bootloader (GRUB or systemd-boot) and append:
find /lib/modules/$(uname -r) -name "*lpro*" -o -name "*aio*ram*" The error often occurs because the initramfs lacks LPRO modules. Rebuild it: allocate ramdisk
Last updated: May 2026 – Compatible with Linux kernels 5.4 through 6.12.
lpro.mem=256M # Allocate 256 MB for LPRO ramdisk aio=legacy # Use legacy AIO (if supported) memmap=128M$0x2000000 # Reserve contiguous memory For GRUB, edit /etc/default/grub and add to GRUB_CMDLINE_LINUX_DEFAULT , then run sudo update-grub . Older kernels (before 5.4) had spotty AIO ramdisk support, especially for custom drivers. Upgrade to a newer long-term support (LTS) kernel: edit /etc/default/grub and add to GRUB_CMDLINE_LINUX_DEFAULT
lsmod | grep -i lpro lsmod | grep -i aio_ramdisk If nothing appears, load the module manually:
