CentOS - Jul 2014 - Troubleshooting suspend/resume problem in Centos 7

I'm trying out CentOS 7 using a HP AMD laptop
http://h10025.www1.hp.com/ewfrf/wc/document?cc=uk&lc=en&docname=c03877039

The problem is the laptop doesn't suspend properly in runlevel 5 /
graphical.target and following guides, I found that it suspends (power
LED blinking) but does not resume in runlevel 3 / multi-user.target.
When it locks up, the machine is unresponsive to ping/ssh so it's not
just a blank screen.

Unfortunately, the only applicable guide I found on troubleshooting
this is for Ubuntu, which requires the kernel to support pm_trace
which isn't found in /sys/power.

Since there is a big red warning on centos.org about
building/compiling my own kernel to add functions, I'm wondering if
there are any alternative method to troubleshoot the issue on CentOS.

I suspect it may be related to the Radeon GPU as I notice that every
now and then after fresh boot, the GUI desktop will freeze for a while
and dmesg will contain errors:
[drm:cik_ib_test] *ERROR* radeon: fence wait failed (-35)
[drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on ring 2 (-35)

As a side note, this laptop had no problems with suspend/resume when
it was running Ubuntu 14.04

On 07/15/2014 11:16 AM, Emmanuel Noobadmin wrote:
> I'm trying out CentOS 7 using a HP AMD laptop
>
http://h10025.www1.hp.com/ewfrf/wc/document?cc=uk&lc=en&docname=c03877039
> 
> The problem is the laptop doesn't suspend properly in runlevel 5 /
> graphical.target and following guides, I found that it suspends (power
> LED blinking) but does not resume in runlevel 3 / multi-user.target.
> When it locks up, the machine is unresponsive to ping/ssh so it's not
> just a blank screen.
> 
> Unfortunately, the only applicable guide I found on troubleshooting
> this is for Ubuntu, which requires the kernel to support pm_trace
> which isn't found in /sys/power.
> 
> Since there is a big red warning on centos.org about
> building/compiling my own kernel to add functions, I'm wondering if
> there are any alternative method to troubleshoot the issue on CentOS.
> 
file an RFE for the centos-plus kernel, maybe we can get this in there ?
Otherwise, nothing really stops you from building your own kernel for
your own machine :)

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Karanbir Singh
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