Public bug reported:
Using the "daily" mainline PPA versions of Linux, from
http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current , both
linux-image-3.14.0-999-generic_3.14.0-999.201403040405_amd64.deb (linux
3.14-rc5-43-g0c0bd34) and the earlier linux 3.14-rc1 fail to modeset
with both the Radeon 5770 and the Radeon 6750 graphics cards. In most
cases the card simply shuts off at the attempt to modeset unless booted
with kernel paramenter radeon.dpm=0 to disable dynamic GPU power
management. At least once the 5770 gave a text mode after a
considerable delay, and the boot messages indicated that Plymouth had
crashed, which also crashed my script for unlocking the encrypted boot
volume.
Not sure if this is the right place to report this given it is a PPA, if
not, where would be the correct place?
I cannot send the lspiv-vnvn.log to a public forum because the
publication of exact hardware information could benefit adversaries
seeking to attack my encrypted computers by means of firmware-based
attacks. I can report that both computers use AMD processors (Phenom II
x4 and FX-8120), one a Radeon HD5770, the other a Radeon 6750.
Here is the version.log for the offending kernel, however.
Linux version 3.14.0-999-generic (apw@gomeisa) (gcc version 4.6.3
(Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201403040405 SMP Tue Mar 4 09:06:13
UTC 2014
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "version.log"
https://bugs.launchpad.net/bugs/1288040/+attachment/4007640/+files/version.log
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https://bugs.launchpad.net/bugs/1288040
Title:
Radeon dpm causes failure to modeset with Linux 3.14 and r600
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