Tomáš Vondra:
On Saturday, October 5, 2019 at 7:45:40 PM UTC+2, Tomáš Vondra wrote:
On Friday, October 4, 2019 at 4:36:57 PM UTC+2, Claudia wrote:
...
There is a pre-release 4.1 iso available.
https://openqa.qubes-os.org/tests/3021
<https://www.google.com/url?q=https%3A%2F%2Fopenqa.qubes-os.org%2Ftests%2F3021&sa=D&sntz=1&usg=AFQjCNEtwV-7EB_Hj9-89w3F8kL7XBW3pA>
- this is a kind of old link so
newer builds may be available. I could not get it to install on my
machine so I couldn't test suspend on it, but it might work for you.
Thanks for the link. I gave it a try and there seems to be some
improvement compared - the installer now works out of the box, without
having to tweak it like I had to with Qubes 4.0. Unfortunately, the
suspend/resume issue is still there, although maybe it actually gets to
sleep this time (but still does not wake up).
I've tried looking for a newer build (the one you posted is from July, so
a couple of months ol), but I haven't found anything. I've been trying to
build ISO locally over the past two weeks, but I keep running into issues
so I haven't been successful in that.
OK, I've noticed there actually is a link to the latest job for that
scenario, leading to https://openqa.qubes-os.org/tests/3737 (which is
2019/08/22 instead of 2019/07/01). Unfortunately the suspend behavior is
the same as for the older build :-(
regards
You mean out of the box? Or when dom0 is brought fully up to date? Odds
are slim, but updating might fix the problem. Also enabling
testing/unstable repos might help.
As far as building your own iso, I'm afraid I don't know anything about
that, but there are plenty of people on this list who could help if you
start a thread about the specific problems you're having.
In general, debugging suspend/resume is quite difficult unless you're a
kernel developer with a serial console. However there are a couple of
things you can do that might get you a step further.
First, it's helpful to know if the machine is actually going into
suspend. Open a few terminals and run `sha256sum /dev/urandom` and wait
for the fans to start running. If you hear them stop, you know it
suspended. If, on resume, you hear them start up again, then it could be
that the machine is partially resuming but just the screen is not coming
back on (possibly indicative of a GPU or WiFi driver problem). Playing a
repeating sound probably has the same effect. You can also hit caps lock
and num lock after resume and see if the lights change.
Try shutting down all VMs before suspending. I think the command is
`qvm-shutdown --all --force --wait` or something like that. Make sure
they're all stopped (e.g., `qvm-ls`). This can tell you if something
with PCI passthru is causing a problem, such as (most likely) the NetVM
or UsbVM (wifi card, wifi driver, usb controller).
Another idea, try disabling VT-x and VT-d in BIOS, then boot Qubes and
try suspend. This might tell you if it's a Xen problem, or a firmware
bug related to VT-x, for example.
If the option is present, try disabling the onboard WiFi card in BIOS.
It's worth trying this for any other hardware too (dGPU, etc).
Try upgrading your machine's firmware. On dell you can do this via
fwupd, Freedos, or using the boot-menu option to upgrade from USB drive.
On my Dell, option 3 was simply broken, so I had to do it from Freedos.
Try installing Fedora with Xen (the basis of Qubes) and see if it
resumes from there.
There are also tons of techniques for debugging suspend on generic
Linux. You can play with acpi_osi=, mem_sleep_default=, `dmesg >
before.txt ; pm-suspend ; dmesg > after.txt`, the list goes on and on.
Here's a nice article to get you started:
https://01.org/blogs/rzhang/2015/best-practice-debug-linux-suspend/hibernate-issues
If you want to read my (thus-far unresolved) experience with suspend in
painstaking detail, check out the rest of the thread starting with this
message:
https://www.mail-archive.com/[email protected]/msg29755.html
That's all I can think of at the moment, but hopefully enough to get you
started.
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