"Dkms install failed" and "Driver_ko_install failed" Reported During Driver Installation

Symptom

An error message similar to the following is displayed during the driver installation.

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[ERROR]Dkms install failed, details in : /var/log/ascend_seclog/ascend_install.log. 
[ERROR]Driver_ko_install failed, details in : /var/log/ascend_seclog/ascend_install.log.

Possible Causes

• The driver fails to be compiled due to a DKMS tool error. As a result, residual DKMS-related files exist.
• The driver fails to be compiled due to the GCC version.

Solution

1. Go to the /var/lib/dkms directory.

   1	cd /var/lib/dkms

2. Delete the davinci_ascend directory.

   1	rm -rf davinci_ascend

3. Reinstall the driver. If the error persists, perform the following operations:
   The following uses GCC 7.3.0 as an example. Run the following command to create a soft link to control the GCC version. For other GCC versions, replace the example path with the actual installation path.

   1. Back up the soft link of the old version.

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      mv /usr/bin/gcc /usr/bin/gcc.bak mv /usr/bin/g++ /usr/bin/g++.bak mv /usr/bin/c++ /usr/bin/c++.bak mv /usr/bin/cc /usr/bin/cc.bak

   2. Create a soft link for the new version.

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      ln -s /usr/local/gcc7.3.0/bin/gcc /usr/bin/gcc ln -s /usr/local/gcc7.3.0/bin/g++ /usr/bin/g++ ln -s /usr/local/gcc7.3.0/bin/c++ /usr/bin/c++ ln -s /usr/local/gcc7.3.0/bin/gcc /usr/bin/cc