Display not properly activated after standby on Kubuntu 20.04
 

I've got a Fujitsu Lifebook u7411 with an 11th gen Core i5-1145G7 processor and Iris Xe graphics. I want to run Kubuntu 20.04 (because of LTS) on it.

Installation was flawless and the notebook works fine, but sleep/standby does not:

When the notebook is woken up, either by opening the lid or pressing a key if it went to sleep while opened, it takes a few seconds. The backlight comes on and i can see and move the mouse pointer. A few seconds later, the backligth goes dark again for a few seconds, then comes on a second time for a few second before it turns off again.

I've tried typing blind to get it to shutdown or reboot, but the notebook does not react. The only way to turn it off is a hard poweroff by pressing the power button 10+ seconds.

There is a ton of posts all over the internet describing similar problems with blank screens after standby and I've tried so many things mentioned in these posts, I've lost track of them.

What I also tried was booting Kubuntu 21.04 from a USB drive. This resulted in a similar behavior, but with different results:

When the notebook is sent to standby on Kubuntu 21.04 and woken up again, The screen remains dark until I move the mouse pointer. Then I can see the whole desktop and even click on things. But it does not react to the keyboard. The screen goes dark again as soon as the mouse movement stops.

I have no idea how to track down the source of the problem, let alone solve it.

Here's the output of lspci:

lsusb:

I do not have answer to your question but can you please tell me if the laptop works OK with Kubuntu


1. Webcam/Mic
2. is keyboard active
3. is the Fan very noisy

(because of contracts my University wants us to buy this laptop only)
Thanks for your response.

We need more than that if you want our help:
What exactly did you try/modify, commands issued, output/log data received.
Please read the first 2 links in my signature.

Oh, and something else:I totally recommend using LTS distros, however not in this case - the processor (and therefore the laptop itslef) was released only this year (2021). You should at the very least use a newer, backported kernel.

1 - Webcam & Mic work fine
2 - active? Yes, I can type with it. Do you mean it has a backlight? No.
3 - no

However, getting the touchpad to work required to add the "i2d_hid" kernel module in the /etc/modules config file.

At the moment I am fighting with the _very_ slow wired LAN connection. Seems it is related to the chipset, other with the same chipset have the same problem, see:

askubuntu.com
bus.launchpad.net
and
bugzilla.kernel.org

I haven't resolved this problem yet since I can get "real" work done using WLAN + VPN at the moment.
Same here :)

My notebook came with BIOS v2.20. After an update to 2.21, the problem was gone. Unfortunately it re-surfaced after a BIOS update to 2.24 :banghead:

Fujitsu u7411 Support Download website

For the time being, I simply disabled the standby mode since I carry the AC adapter with me anyway and do not need to save the battery power. I'll post if the next BIOS or kernel update will bring another change.

It is commonly recommended that you not upgrade bios when the system works as is because of potential issues caused. The phrase "If it ain't broke, don't fix it!" comes to mind there.

Is there any way to revert the bios to the 2.21 version?

Also, about the LAN being slow:
You may need to get the chipset and version of the ethernet interface so you can obtain the proper driver for it. The command "lspci" or "inxi -Nxx" should do that for you, then search online for the model and chipset of the ethernet controller to see what driver supports it best.

This has nothing to do with what I recommended. Please actually click on the links and read.

Did you find any solution to this issue?

Hello user,

Are there any issues still with this notebook? Thanks

Did you read the thread in its entirety?
You should provide a full problem description (hint: the forst 2 links in my signature) in any case. There's no such thing as "I have the exact same issue".

Did you read the advice given so far?
Maybe a good first second step would be to provide all the additional info OP has NOT provided yet.

Yes I did read (I am linux user for about 15 years). The problem is I need to buy it through my employer. And once it is bought I cannot change. (i.e) if it has linux compatibility issues then I am stuck with it forever. (cannot take a risk)

I see. In that case, a web search like install linux on Fujitsu Lifebook u7411 will get you much further:
https://www.reddit.com/r/linuxhardwa...u7411_how_the/
And apparently one german university runs Ubuntu on them.

The reddit post does not give any information. It links back to this thread! Did you read it?

> And apparently one german university runs Ubuntu on them.

I am from that Uni; the sales person that wrote this just copied and pasted it from the 'company's documents'. He said he cannot promise anything. A few people locally were complaining that keyboard *sometimes* stops working when resuming from sleep but no one is interested in testing/reporting.

OK. Sorry for trying to do web searches on your behalf.

Fujitsu-Siemens U7411 and Linux
 

FWIW, I am looking into running Linux on this machine as well and mainly ran into the issues mentioned on this page.
So far I have tried Debian Bullseye and Linux Mint 20.2 and the experience is quite similar: the touchpad and wake-up from suspend don't work out-of-the-box / with default settings.
My findings go slightly beyond what is already mentioned on the website at the time of writing, so I am going to summarize them here:

Touchpad
It is correct that loading the i2c-hid module is required. This does not always seem to be sufficient. With different kernels I had varying success.
I can confirm that it works with the current Debian kernel linux-image-5.10 and Linux Mint kernel linux-image-5.11.0-43-generic.
On older AND newer kernels on Mint, I have NOT managed to get it to work as loading of the hid-multitouch module is not triggered, which seems to be the culprit. Manually loading this module does not help.

Wake-up from suspend
It seems there are two main issues here:

• Re-initialization of the graphics card.
• General ability of waking up the system.

The first issue manifests itself as flickering of the display after wake-up. This seems to be resolved by adding i915.enable_psr=0 to the linux command line (i.e. in /etc/default/grub).
BTW, if the machine is in this state, it is still possible to log in via ssh, so at least it is possible to save your work and reboot somewhat gracefully.

The second issue is more annoying: it is impossible to reactivate the laptop from sleep no matter what you do, except for long-pressing the power button and switching it off.
At least on my machine with BIOS version 2.27, it was not sufficient to change the BIOS power management settings to "normal" (as suggested in the link above).
Disabling the hardware power management completely seemed to have fixed the issue for me.
I have not looked yet into what that actually means (e.g. CPU/GPU not entering certain power saving states), but at least suspend and wake-up seem to be working now as expected.

I am hoping that at least the power management issues are resolved over time with updates to Intel drivers and firmware (it seems to affect other machines as well).
For the touchpad, it is a continuation of an issue that already existed for the U7410...so I am just hoping that it will work more reliably with future kernel updates even if the appropriate module has to be loaded manually.

As a conclusion: I have seen much better linux compatibility (Lenovo), but also much worse (older Fujitsu models).
I am probably in the same boat with a few of the previous posters that are supplied with this particular model by their university in south-western Germany. ;)