Kernel modesetting is failing for Radeon graphics after system update
Issue
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GNOME screen is not getting loaded after system update and reboot. (See below screeshot gnome-error.jpg)

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Display is faling for [AMD/ATI] Oland GL [FirePro W2100] graphics card on RHEL 6.
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Kernel Modesetting [KMS] is not happening for ATI card. Xorg falling back to use FBDEV driver.
[ 13.232] (II) [KMS] drm report modesetting isn't supported. [ 13.232] (EE) open /dev/dri/card0: No such file or directory [ 13.232] (WW) Falling back to old probe method for modesetting [ 13.232] (EE) open /dev/dri/card0: No such file or directory
Environment
- Red Hat Enterprise Linux 7.2
- xorg-x11-drv-ati-7.5.0-3.el7.x86_64
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