Public bug reported:
Suspend to RAM fails for me with the radeon driver and two cards on an
Asus P6T SE motherboard: Juniper and Caicos. Even at console in single
user mode (to eliminate Xorg) and with "echo devices >
/sys/power/pm_test" and "echo freeze > /sys/power/state" to narrow it
down to unloading modules (it works with "freezer" sent to pm_test).
Unloading the radeon module (needed to blacklist with a kernel parameter
first) lets everything work.
Tried the stock Ubuntu Trusty 3.13.0 kernel and also tried using 3.14.10
and 3.15.3 from the PPA. All fail, but 3.15 has the screen go white
after a bit so that's new.
Tried installing various new X stuff that probably is totally unrelated
via ppa:oaibaf/graphics-drivers
Tried disabling dpm with the radeon.dpm=0 parameter.
Tried disabling synchronous suspend with "echo 0 > /sys/power/async".
Not sure what else to try?
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: radeon suspend
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https://bugs.launchpad.net/bugs/1338275
Title:
[radeon] suspend fails in 14.04 with Juniper and Caicos on an Asus P6T
SE
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