Simply impossible to use an Nvidia card on a real-time kernel (no musician can use nvidia)

Graphics / Linux Linux
8

This was shared on the Gentoo forums awhile back and also somewhere else on these forums but here it is.

Works good on my computer, but I do not take any responsibility. Nvidia also does not support this fix. CYA, I am sure you understand.

  1. Download the driver for your video card.

  2. Run:
    cd /usr/src
    /[path to the downloaded driver]/NVIDIA-Linux-x86_64-260.19.29.run -x

  3. Open the file /usr/src/NVIDIA-Linux-x86_64-260.19.29/kernel/nv-linux.h and make the following changes:

Replace:
#if defined(CONFIG_PREEMPT_RT)
typedef atomic_spinlock_t nv_spinlock_t;
#define NV_SPIN_LOCK_INIT(lock) atomic_spin_lock_init(lock)
#define NV_SPIN_LOCK_IRQ(lock) atomic_spin_lock_irq(lock)
#define NV_SPIN_UNLOCK_IRQ(lock) atomic_spin_unlock_irq(lock)
#define NV_SPIN_LOCK_IRQSAVE(lock,flags) atomic_spin_lock_irqsave(lock,flags)
#define NV_SPIN_UNLOCK_IRQRESTORE(lock,flags) \
atomic_spin_unlock_irqrestore(lock,flags)
#define NV_SPIN_LOCK(lock) atomic_spin_lock(lock)
#define NV_SPIN_UNLOCK(lock) atomic_spin_unlock(lock)
#define NV_SPIN_UNLOCK_WAIT(lock) atomic_spin_unlock_wait(lock)
#else
typedef spinlock_t nv_spinlock_t;
#define NV_SPIN_LOCK_INIT(lock) spin_lock_init(lock)

With:
#if defined(CONFIG_PREEMPT_RT)
typedef raw_spinlock_t nv_spinlock_t;
#define NV_SPIN_LOCK_INIT(lock) raw_spin_lock_init(lock)
#define NV_SPIN_LOCK_IRQ(lock) raw_spin_lock_irq(lock)
#define NV_SPIN_UNLOCK_IRQ(lock) raw_spin_unlock_irq(lock)
#define NV_SPIN_LOCK_IRQSAVE(lock,flags) raw_spin_lock_irqsave(lock,flags)
#define NV_SPIN_UNLOCK_IRQRESTORE(lock,flags) \
raw_spin_unlock_irqrestore(lock,flags)
#define NV_SPIN_LOCK(lock) raw_spin_lock(lock)
#define NV_SPIN_UNLOCK(lock) raw_spin_unlock(lock)
#define NV_SPIN_UNLOCK_WAIT(lock) raw_spin_unlock_wait(lock)
#else
typedef spinlock_t nv_spinlock_t;
#define NV_SPIN_LOCK_INIT(lock) spin_lock_init(lock)

Replace:
#if defined(CONFIG_PREEMPT_RT)
#define NV_INIT_MUTEX(mutex) semaphore_init(mutex)
#else
#if !defined(__SEMAPHORE_INITIALIZER) && defined(__COMPAT_SEMAPHORE_INITIALIZER)
#define __SEMAPHORE_INITIALIZER __COMPAT_SEMAPHORE_INITIALIZER

With:
#if defined(CONFIG_PREEMPT_RT)
#define NV_INIT_MUTEX(mutex) sema_init(mutex,1)
#else
#if !defined(__SEMAPHORE_INITIALIZER) && defined(__COMPAT_SEMAPHORE_INITIALIZER)
#define __SEMAPHORE_INITIALIZER __COMPAT_SEMAPHORE_INITIALIZER

  1. Run:
    /usr/src/NVIDIA-Linux-x86_64-260.19.29/nvidia-installer

Hope that helps. Good luck.