I have been using a Legion Slim 5 16APH8 laptop (Ryzen 7 7840HS w/ Radeon 780M + RTX 4070 + 32Gb DDR5 RAM) for the past month or so and noticed that I have very random video freezes and sometimes straight up reboots (with or even without BSOD). At first I thought it was a lack of RAM problem, I use the laptop for coding and sometimes when emulating applications the RAM consumption tends to be pretty high, so I've upgraded the factory 16Gb to 32Gb but to no avail.

It seems to happen less when using Windows (I have a dual boot in a separate drive with Ubuntu), and I also noticed that disabling dynamic graphics in BIOS and using the discrete card tends to be way more stable than with the dynamic graphics enabled (when using dynamic graphics in Ubuntu for example it either lasts a few hours, or it straight up crashes upon login). I've manually downloaded and installed all software updates for my laptop from lenovo website and ran all extended versions of the tests in Lenovo Diagnostic Solutions but everything passed (CPU, integrated graphics and discrete graphics). 

I've read some forums online that point to a problem with the integrated graphics, but they seem to be of a year ago and I hope that a patch for that has long been released by AMD. I am at a loss, what should I verify (in either Windows or Ubuntu) to try and narrow this problem down? I'd like to determine if this is a software or hardware problem (sending the device to Lenovo support is not an option for me because I bought the machine while travelling and my country doesn't provide support for this model).

Edit.:
- It seems to happen more frequently while browsing.

Hi jpcanesin,

I am sorry that you are having this issue. Have you checked for any power-saving features in the BIOS or Windows that might conflict with dynamic graphics? As a potential resolution, I recommend disabling Hybrid/Dynamic Graphics in the BIOS and using only the discrete GPU. To do this, restart your laptop and press F2 (or the appropriate key for your system) during boot to enter the BIOS. Navigate to the Display or Graphics settings, locate the option labeled Hybrid Mode or Dynamic Graphics, and change it to Discrete Graphics Only. Finally, save your changes and exit the BIOS. This should help improve stability by bypassing any conflicts caused by dynamic graphics switching.

Best regards,
Hassen_Lenovo

Hi Hassen,

I hardly view that as a "solution" to this problem. Dynamic graphics should be a key feature of the device regarding lower power consumption and longer usage when unplugged as the discrete graphics consume a lot of power.

As a matter of fact I've already been using the device with dynamic graphics disabled for quite a while to avoid too much restarts, but even then I still experience system crashes. Regarding the power-saving features in BIOS, I made sure to check them a while back and disabled any overclocking and "higher power" consumption features on the hopes to identify the problem, but even then it crashes. Is there any logs (in Windows or Ubuntu) that I can generate that can help me diagnose this?

I've been using it in Windows and logged with Event Viewer the latest crash. This is what I’ve noticed

• On boot, got two warnings saying that Driver/WUDFRd failed to load for devices ROOT/SYSTEM/0001 and ROOT/SYSTEM/0002
  
  • Searching for this error I’ve stumbled upon a thread (link) that recommended checking devices with problems in Windows Device Manager, and in fact I found that it doesn’t recognize the driver for ROOT\INSYDEDEVICE\0000 (when selecting to search for driver it found nothing). But looking at Registry Editor I narrowed it to a device related to the BIOS (the hardware ID is {416C2604-443B-436F-9E1D-607BDC3CC785}\H2OFFT, and looking online it matched with a device named WDF Insyde IO). But I don’t know what to do with that, I’ve already installed the latest BIOS driver from Lenovo.
• Warnings that some LSA packages were not properly signed: negoexts, kerberos, msv1_0, tspkq, pku2u, cloudap, wdigest, schannel, sfapm
• Error that Windows search terminated unexpectedly stating that “The specified login session does not exist.”
• Error that NVIDIA LocalSystem Container was terminated unexpectedly stating that “A generic command executable returned a result that indicates failure”. The service retried a total of 12 times, all with same error. After this error the system rebooted.
  
  • After investigating a bit further this error is happening every 10s, even when the system works properly. So although it is a problem I don’t think it is related to the rebooting.
• I also got a BSOD with error SYSTEM_THREAD_EXCEPTION_NOT_HANDLED, caused by driver ntoskrnl.exe.Searching online it might be caused by software of hardware problems.

Well that’s it, that’s what I could gather form Event Viewer. Still can’t point with certainty to a specific software/hardware that is failing. It happens randomly, might happen right upon login, might happen after 5 hours of work. It is strange to me that when I bought the laptop none of this happened, is there a way revert drivers (including BIOS) back to factory settings?

I will add as well, when using dynamic graphics I’ve noticed that after a crash AMD Adrenalin software popped a notification saying it reverted some boosting configurations due to the crash. The crashes persist, but maybe that really indicates something related to the processor as I pointed in the original post, I just don’t know what (again all stress tests passed).

Saw another post (link) that attributed fails with AMD chipset to temperature. Since them I’ve monitored it and during usage in Performance mode the CPU is idling at 40C, and occasionally jumping to 55. I know that my laptop has been sitting in store for a year before I purchased it and maybe the thermal paste is bad. Is 40-55 a normal temp range for the laptop?

As of now the only way to use my laptop is by turning discrete graphics on in BIOS and prime-select nvidia in Ubuntu. This seems to be a config that makes Ubuntu not crash, well makes it not crash so instantly as it still will crash given longer running time. On Windows things seem to hold a lot better, and that may have something to do with having the vantage software. My hunch now is that this is a thermal problem and since the fan control is entirely done by the board and not the OS it runs poorly in Ubuntu but better in Windows with the Vantage software. 

The Legion Slim 5 16APH8 in my opinion is unsuitable for Linux given this hassle.