** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Precise)
Importance: Undecided => High
** Changed in: linux (Ubuntu Precise)
Importance: High => Medium
** No longer affects: linux (Ubuntu Precise)
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https://bugs.launchpad.net/bugs/1386973
Title:
Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Trusty:
Confirmed
Status in linux source package in Utopic:
Confirmed
Status in linux source package in Vivid:
Fix Committed
Bug description:
I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT
[Radeon HD 7770/8760 / R7 250X].
When I boot from the Utopic DVD I get to the language menu and I can select
try ubuntu without installing, but after a few sencods I get "BUG: soft lockup
- CPU#0 stuck for 22s!'" and the message just repeats every 22 secods forever.
I tried setting nomodeset using the F6 menu, but I got exactly the
same result.
This is Ubuntu 14.10 64 bits which basically seems unable to boot with
that hardware.
The experience was the same with 14.04, but I thought 14.10 would be
better. In 14.04 disabling the video card and booting off the
integrated graphics let me set nomodeset in /etc/default/grub and I
was able boot with the R7 250X with the VESA driver. Installed
Catalyst afterwards.
===
break-fix: - 16b036af31e1456cb69243a5a0c9ef801ecd1f17
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