kernel-packages team mailing list archive
Mailing list archive
[Bug 1568211] Re: no UMS support in radeon module
I have a computer with AMD A8-6600K APU processor with a module Radeon
HD Graphics (HD 8570D)
Booting a new Ubuntu 16.04 from a LiveDVD the monitor receives no
signal and apparently nothing happens, except the running of the DVD-
However, booting with the option Nomodeset is successful, only a message
shows up that no UMS support is present in the Radeon module.
I am not sure this IS a bug, reading http://www.phoronix.com/scan.php?page=news_item&px=MTI2ODA
(if I am not expected to provide links, please excuse me)
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
no UMS support in radeon module
Status in linux package in Ubuntu:
I upgraded overnight from Wily to Xenial. The system will not boot.
Only a blank screen after grub loads the kernel.
The recovery kernel loads fine and I was able to find the following
[drm] VGACON disable radeon kernel modesetting
[drm:radeon_init [radeon]] *ERROR* no UMS support in radeon module!
The recovery kernel command line had a nomodeset parameter that was
not in the main kernel command line.
Adding the nomodeset parameter the main kernel command line finally
booted the system. It's kind of ugly but it seems to work.
Note: For what it's worth I reported a similar issue against several
Utopic kernels (bug #1407505). There was a back and forth with
jsalisbury until a kernel finally worked. I have had no problems until
Hope that helps.
To manage notifications about this bug go to: