Ubuntu 14.04 startup prompt set_sw_state failed
After Ubuntu 14.04 is installed, a problem occurs during system startup.
Kernel: [16.465893] [drm: rv770_dpm_set_power_state] * ERROR * rv770_set_sw_state failed
The video card is ATI4330. Google. There are similar problems on the Internet. I decided to upgrade the kernel.
The original kernel is 3.13. From the ubuntu kernel site, we can see that the latest version is v3.15-rc2-trusty, which is more stable than kernel. So I downloaded and upgraded it.
Three files need to be downloaded. My computer is amd64. The
Linux-headers-3.15.0-031500rc2_3.15.0-031500rc2.201404201435_all.deblinux-headers-3.15.0-031500rc2-generic_3.15.0-031500rc2.201404201435_amd64.deblinux-image-3.15.0-031500rc2-generic_3.15.0-031500rc2.201404201435_amd64.deb
After the download. Install
Sudo dpkg-I linux-*. deb
After restarting. The error disappears.