Possible KB5121003 issue causing random AC adapter disconnects / black screens on Lenovo Legion?

I’m trying to figure out a strange issue that started very recently on my Lenovo Legion.

The laptop randomly goes to a black screen for a couple of seconds and then recovers. At first I thought it was an NVIDIA/Optimus or refresh-rate issue, but I started monitoring the Windows AC power state directly.

What I found is that whenever this happens, Windows actually reports:

AC → Battery → AC

for roughly 1–5 seconds.

I then checked the historical Windows Kernel-Power Event ID 105 logs. My System log goes back to March 2026, but the first occurrence of these short AC-loss events is August 12.

The interesting part is that KB5121003 was installed on my system late on August 11.

Since then I have recorded around 40 AC power transitions, most lasting only a few seconds. Examples:

07:41:55 → 07:42:02
13:12:35 → 13:12:36
17:17:50 → 17:17:52
02:17:32 → 02:17:37

and many more over the following days.

Windows Kernel-Power itself logs AcOnline=false, followed shortly by AcOnline=true, so this isn't only the battery icon/UI changing.

Another strange detail is that the physical charging LED on the laptop can remain on while this happens.

I have now temporarily uninstalled KB5121003 as a test.

Before rollback:

Windows 11 25H2 – Build 26200.9168

After rollback:

Windows 11 25H2 – Build 26200.8875

Windows Update is paused and I haven't changed anything else: same Intel driver, NVIDIA driver, BIOS, Hybrid Mode, Optimus settings, charger, etc.

I'm currently running a 50 ms AC-state monitor for the next 24–48 hours to see whether the AC_LOST events disappear after removing KB5121003.

Obviously this doesn't prove the update is responsible yet. It could still be Lenovo firmware/EC behavior or a hardware power issue. But the fact that the event history starts immediately after this update is suspicious enough that I'm testing it as the only changed variable.

Has anyone else on KB5121003, especially Lenovo Legion users, noticed random Kernel-Power 105 events, brief AC-to-battery transitions, or black screens that started around August 12?

reddit.com
u/Nervous-Buffalo-4826 — 2 days ago

Possible KB5121003 issue causing random AC adapter disconnects / black screens on Lenovo Legion?

I’m trying to figure out a strange issue that started very recently on my Lenovo Legion.

The laptop randomly goes to a black screen for a couple of seconds and then recovers. At first I thought it was an NVIDIA/Optimus or refresh-rate issue, but I started monitoring the Windows AC power state directly.

What I found is that whenever this happens, Windows actually reports:

AC → Battery → AC

for roughly 1–5 seconds.

I then checked the historical Windows Kernel-Power Event ID 105 logs. My System log goes back to March 2026, but the first occurrence of these short AC-loss events is August 12.

The interesting part is that KB5121003 was installed on my system late on August 11.

Since then I have recorded around 40 AC power transitions, most lasting only a few seconds. Examples:

07:41:55 → 07:42:02
13:12:35 → 13:12:36
17:17:50 → 17:17:52
02:17:32 → 02:17:37

and many more over the following days.

Windows Kernel-Power itself logs AcOnline=false, followed shortly by AcOnline=true, so this isn't only the battery icon/UI changing.

Another strange detail is that the physical charging LED on the laptop can remain on while this happens.

I have now temporarily uninstalled KB5121003 as a test.

Before rollback:

Windows 11 25H2 – Build 26200.9168

After rollback:

Windows 11 25H2 – Build 26200.8875

Windows Update is paused and I haven't changed anything else: same Intel driver, NVIDIA driver, BIOS, Hybrid Mode, Optimus settings, charger, etc.

I'm currently running a 50 ms AC-state monitor for the next 24–48 hours to see whether the AC_LOST events disappear after removing KB5121003.

Obviously this doesn't prove the update is responsible yet. It could still be Lenovo firmware/EC behavior or a hardware power issue. But the fact that the event history starts immediately after this update is suspicious enough that I'm testing it as the only changed variable.

Has anyone else on KB5121003, especially Lenovo Legion users, noticed random Kernel-Power 105 events, brief AC-to-battery transitions, or black screens that started around August 12?

reddit.com
u/Nervous-Buffalo-4826 — 2 days ago

Possible KB5121003 issue causing random AC adapter disconnects / black screens on Lenovo Legion?

I’m trying to figure out a strange issue that started very recently on my Lenovo Legion.

The laptop randomly goes to a black screen for a couple of seconds and then recovers. At first I thought it was an NVIDIA/Optimus or refresh-rate issue, but I started monitoring the Windows AC power state directly.

What I found is that whenever this happens, Windows actually reports:

AC → Battery → AC

for roughly 1–5 seconds.

I then checked the historical Windows Kernel-Power Event ID 105 logs. My System log goes back to March 2026, but the first occurrence of these short AC-loss events is August 12.

The interesting part is that KB5121003 was installed on my system late on August 11.

Since then I have recorded around 40 AC power transitions, most lasting only a few seconds. Examples:

07:41:55 → 07:42:02
13:12:35 → 13:12:36
17:17:50 → 17:17:52
02:17:32 → 02:17:37

and many more over the following days.

Windows Kernel-Power itself logs AcOnline=false, followed shortly by AcOnline=true, so this isn't only the battery icon/UI changing.

Another strange detail is that the physical charging LED on the laptop can remain on while this happens.

I have now temporarily uninstalled KB5121003 as a test.

Before rollback:

Windows 11 25H2 – Build 26200.9168

After rollback:

Windows 11 25H2 – Build 26200.8875

Windows Update is paused and I haven't changed anything else: same Intel driver, NVIDIA driver, BIOS, Hybrid Mode, Optimus settings, charger, etc.

I'm currently running a 50 ms AC-state monitor for the next 24–48 hours to see whether the AC_LOST events disappear after removing KB5121003.

Obviously this doesn't prove the update is responsible yet. It could still be Lenovo firmware/EC behavior or a hardware power issue. But the fact that the event history starts immediately after this update is suspicious enough that I'm testing it as the only changed variable.

Has anyone else on KB5121003, especially Lenovo Legion users, noticed random Kernel-Power 105 events, brief AC-to-battery transitions, or black screens that started around August 12?

reddit.com
u/Nervous-Buffalo-4826 — 2 days ago
▲ 6 r/Frozen

What if the mysterious figure from the concept art uses a cursed mirror against Anna?

​

This is completely speculation, but after seeing the Frozen 3 concept art and thinking about Once Upon a Time serie, I started wondering if Disney could finally use one of the biggest elements from the original Snow Queen story: the evil mirror.

In the Frozen 3 concept art, Elsa, Anna and Olaf are travelling toward that strange glowing place in the distance, while there is also a mysterious dark humanoid-looking figure in the foreground with what looks like horns/antlers and possibly a staff or spear.

Disney hasn't confirmed that this figure is evil or even explained what it is, so I'm not saying this is definitely the villain.

But what if it is?

And more specifically, what if this character is connected to some older and darker form of magic that Elsa and Anna haven't encountered before?

This is where I think the original Hans Christian Andersen The Snow Queen could finally become important.

In Andersen's story, there is a magical mirror created by an evil being. The mirror doesn't simply control people. It distorts the way they see everything good. When pieces of the mirror enter someone's eyes and heart, beautiful things appear ugly and the person becomes cold, cruel and emotionally disconnected.

The Frozen movies have borrowed a lot from The Snow Queen, obviously, but they have never really adapted the mirror itself.

Now imagine the mysterious figure in Frozen 3 possesses something similar.

Maybe Elsa and Anna discover that Ahtohallan and the elemental spirits aren't the only ancient magical forces in this world. Elsa represents one side of that magic as the Fifth Spirit, while this new figure represents something darker — magic that doesn't attack physically, but corrupts emotions and perception.

And the target wouldn't be Elsa.

It would be Anna.

This also reminded me of the Frozen storyline in Once Upon a Time Season 4. The Snow Queen uses the Spell of Shattered Sight, which brings out everyone's darkest thoughts and turns people against each other. Elsa and the Snow Queen aren't affected.

Disney obviously wouldn't copy that exact storyline, but the basic idea could work incredibly well in an actual Frozen movie.

What if Elsa is immune because she's the Fifth Spirit, while Anna isn't?

Anna gets affected by the mirror, but instead of becoming some cartoonishly evil version of herself, it starts twisting emotions that might actually exist somewhere inside her.

Because if you look at Anna's life, there is a LOT the mirror could use.

She spent most of her childhood alone because Elsa had powers.

Their parents left on the journey that eventually killed them partly because they were trying to understand Elsa's magic.

Anna almost died because of Elsa in the first movie.

In Frozen II, Elsa once again pushes Anna away, goes off alone and eventually decides to remain with the spirits while Anna stays behind and becomes Queen of Arendelle.

Anna accepts all of that because she loves Elsa.

But a magical mirror could completely change the way she interprets those same memories.

Instead of:

“Elsa was scared and trying to protect me.”

Anna starts thinking:

“Elsa abandoned me.”

Instead of:

“Elsa found where she belongs.”

It becomes:

“Elsa chose the spirits instead of me.”

And eventually Anna could start emotionally attacking Elsa.

“You always leave me.”

“Everything has always been about you.”

“I spent my entire life chasing after you.”

“You decided what was best for me without ever asking me.”

And then imagine Anna saying the one thing that would completely destroy Elsa:

“You spent your whole life afraid you were going to hurt me. Maybe you were right.”

That would be a much more dangerous attack against Elsa than another monster or army.

Elsa is ridiculously powerful now. She crossed the Dark Sea, controlled the Nokk, survived Ahtohallan and became the Fifth Spirit.

It's difficult to create a physical enemy that feels threatening to her.

But Elsa has one enormous weakness.

Anna.

If Anna genuinely appears to hate her, Elsa can't just freeze the problem.

And the really interesting question would be whether the mirror is completely inventing Anna's feelings or simply magnifying things Anna has never admitted.

Maybe Anna really WAS hurt when Elsa decided to stay in the Enchanted Forest.

Maybe she does sometimes resent being the person who constantly has to chase Elsa whenever Elsa decides she has to solve everything alone.

Maybe suddenly becoming Queen created pressure Anna never talked about.

Maybe Anna loves Elsa more than anyone while simultaneously carrying some buried anger toward her.

The mirror could take those normal complicated emotions and remove everything balancing them — love, empathy, context and forgiveness.

There could even be a point where Elsa finally becomes angry herself.

We've seen Elsa scared, guilty, lonely and determined, but we've almost never seen her genuinely furious.

Imagine corrupted Anna pushing her emotionally over and over until Elsa finally snaps and uses her powers against her.

Anna looks genuinely terrified of Elsa.

And Elsa immediately realizes what she has done.

That would reverse Frozen 1 completely.

Originally Elsa was terrified that her powers would hurt Anna.

Now, after finally believing she had mastered herself, the mirror manipulates Anna into making that fear come true again.

And maybe that's exactly what this mysterious figure wants.

Not to defeat the Fifth Spirit physically.

To break her emotionally.

It could also explain why the villain uses a mirror instead of attacking Elsa directly. Maybe Elsa's magic makes her almost impossible to corrupt, so the villain realizes the easiest way to destroy the Fifth Spirit is through the person she loves most.

Anna.

Eventually they could destroy the mirror and save Anna, but I wouldn't want everything Anna said to simply disappear as “the curse talking.”

The better ending would be Anna admitting that some of those feelings actually existed.

She loves Elsa, but Elsa leaving still hurt her.

Elsa loves Anna, but she has a habit of deciding she needs to protect everyone by disappearing and handling things alone.

They finally have to talk about it as two adult sisters instead of pretending their relationship has no resentment or unresolved problems.

And since Frozen 3 and Frozen 4 are supposed to form a larger story, you could end Frozen 3 with them believing the threat is over.

The mysterious figure is defeated.

The mirror is shattered.

Anna is herself again.

Elsa picks up one remaining piece.

She looks into it.

Nothing happens.

Of course it doesn't. She's the Fifth Spirit. She's immune.

Elsa puts it down and walks away.

But her reflection stays behind.

Watching her.

Cut to black.

Obviously this is just a theory, and the dark figure in the concept art hasn't even been confirmed to be a villain.

But if Disney really wants to go deeper into the origin of Elsa's magic in Frozen 3/4, I think connecting that mysterious figure to the original Snow Queen mirror — and using Anna rather than Elsa as the person corrupted by it — could make for a genuinely interesting story.

reddit.com
u/Nervous-Buffalo-4826 — 13 days ago