[Bug 1424363] [NEW] casper requires nomodeset on r700 chipset for kubuntu plasma 5

[James Stewart Miller]

Public bug reported:

in order to get kubuntu plasma 5 running on my laptop I had to set the
nomodeset option, otherwise X is inoperable, but I can switch to a
console.  I've read some reports that the kernel 3.16 might be having
issues with modesetting for the radeon driver with kernel bisects
mentioned, so perhaps this is the issue with the kernel bundled with the
download being affected.

I installed from a pendrive made with unetbootin.

My chipset is an r700 so there is no closed source driver so I have to
use the Radeon driver.

$ lsb_release -rd
Description:    Ubuntu 14.10
Release:        14.10

$ uname -a
Linux super-R720 3.16.0-31-generic #41-Ubuntu SMP Tue Feb 10 15:24:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] RV730/M96 [Mobility Radeon HD 4650/5165] (prog-if 00 [VGA
controller])

I expected casper to boot into X.  Instead it booted to a black screen.
I had to edit the boot options in grub at runtime to add the nomodeset
option.

Since installation I have had no real problems (other than some reported
already on kde bugs such as crashing to boot screen which are fixed by
using proposed updates.

** Affects: casper (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to casper in Ubuntu.
https://bugs.launchpad.net/bugs/1424363

Title:
  casper requires nomodeset on r700 chipset for kubuntu plasma 5

Status in casper package in Ubuntu:
  New

Bug description:
  in order to get kubuntu plasma 5 running on my laptop I had to set the
  nomodeset option, otherwise X is inoperable, but I can switch to a
  console.  I've read some reports that the kernel 3.16 might be having
  issues with modesetting for the radeon driver with kernel bisects
  mentioned, so perhaps this is the issue with the kernel bundled with
  the download being affected.

  I installed from a pendrive made with unetbootin.

  My chipset is an r700 so there is no closed source driver so I have to
  use the Radeon driver.

  $ lsb_release -rd
  Description:    Ubuntu 14.10
  Release:        14.10

  $ uname -a
  Linux super-R720 3.16.0-31-generic #41-Ubuntu SMP Tue Feb 10 15:24:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
  [AMD/ATI] RV730/M96 [Mobility Radeon HD 4650/5165] (prog-if 00 [VGA
  controller])

  I expected casper to boot into X.  Instead it booted to a black
  screen.  I had to edit the boot options in grub at runtime to add the
  nomodeset option.

  Since installation I have had no real problems (other than some
  reported already on kde bugs such as crashing to boot screen which are
  fixed by using proposed updates.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1424363/+subscriptions