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UHD panel upgrade T14/T15 gen 2: odd behaviour
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- Senior Member
- Posts: 745
- Joined: Fri Sep 21, 2007 11:37 pm
- Location: Downtown Toronto, Canada
UHD panel upgrade T14/T15 gen 2: odd behaviour
Hi all. I'm trying to do some problem solving... I bought my father a 15.6" UHD panel upgrade (AUO B156ZAN04.1) to replace the original FHD panel in his T15 gen 2. I bought a compatible 40-pin eDP UHD cable (narrow 0.4mm pitch) and connected the panel and board
photos: https://imgur.com/a/Ln1YZGY
On boot, the Lenovo logo displays correctly, and BIOS also displays correctly. When booting into ubuntu, the picture displays correctly at 3840x2160
However... in Windows 10, there are vertical stripes across the whole screen and it appears black and white. It seems almost as if the RGB channels are out of horizontal synch, as they seem offset from each other. It seems like an hsynch issue - which I've never come across on a digital video signal, but was not uncommon with analog VGA
Laptop is on the Newest Windows 10 update, newest BIOS, newest Intel graphics driver, newest ThinkPad Monitor file, and newest NVidia T500 graphics driver...
I've tried disabling the Xe graphics driver - without change. Same with disabling the NVidia driver.
any ideas? It seems almost certain to be a driver issue... I just can't figure out which one
I've also tried a 40 pin eDP 0.5mm pitch cable with a QHD 2560x1440 panel, and UHD 3840x2160 panel and it works perfectly...
photos: https://imgur.com/a/Ln1YZGY
On boot, the Lenovo logo displays correctly, and BIOS also displays correctly. When booting into ubuntu, the picture displays correctly at 3840x2160
However... in Windows 10, there are vertical stripes across the whole screen and it appears black and white. It seems almost as if the RGB channels are out of horizontal synch, as they seem offset from each other. It seems like an hsynch issue - which I've never come across on a digital video signal, but was not uncommon with analog VGA
Laptop is on the Newest Windows 10 update, newest BIOS, newest Intel graphics driver, newest ThinkPad Monitor file, and newest NVidia T500 graphics driver...
I've tried disabling the Xe graphics driver - without change. Same with disabling the NVidia driver.
any ideas? It seems almost certain to be a driver issue... I just can't figure out which one
I've also tried a 40 pin eDP 0.5mm pitch cable with a QHD 2560x1440 panel, and UHD 3840x2160 panel and it works perfectly...
ThinkPad P14sgen2 (2021)
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
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- Senior Member
- Posts: 745
- Joined: Fri Sep 21, 2007 11:37 pm
- Location: Downtown Toronto, Canada
Re: UHD panel upgrade T14/T15 gen 2: odd behaviour
Update: after I first tried this on my P14s gen 2 (identical to T14 gen 2) motherboard, I tried it on my T15 gen 2 motherboard. On the T14 gen 2 it always looks like the striped image. It works on the T15 gen 2 motherboard, but if I go on 'standby' then reopen the laptop it again looks like the striped image. Since the P14s, T14, and T15 gen 2 share an identical motherboard - I'm totally puzzled by this
Strangely, if I hibernate or shut down (whether full shut down or Windows 10 modern shut down) the image comes back normal. For now I've disabled standby in every possible way.
So it's definitely a driver issue. And no, resetting the driver with Win+Ctrl+Shift+B does nothing. I've tried several times to uninstall and reinstall the Intel display drivers, but still no change.
I still get an error "2203: system configuration is invalid" every time the system starts up from cold boot, modern shut down, or waking up from hibernation. I have no idea how to fix this...
Strangely, if I hibernate or shut down (whether full shut down or Windows 10 modern shut down) the image comes back normal. For now I've disabled standby in every possible way.
So it's definitely a driver issue. And no, resetting the driver with Win+Ctrl+Shift+B does nothing. I've tried several times to uninstall and reinstall the Intel display drivers, but still no change.
I still get an error "2203: system configuration is invalid" every time the system starts up from cold boot, modern shut down, or waking up from hibernation. I have no idea how to fix this...
ThinkPad P14sgen2 (2021)
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
Re: UHD panel upgrade T14/T15 gen 2: odd behaviour
Maybe the panel EDID's (or equivalent) is damaged. Or maybe there is a display panel whitelist in the BIOS...
X301: SU9600 | 8GB | 1TB | WXGA+
X1C5: 7600U | 16GB | 1TB | FHD
X1C9: 1145G7 | 16GB | 1TB | WUXGA | WWAN
X1Y8: 1365U | 32GB | 1TB | WUXGA
P14s G1 AMD: 4750U | 32GB | 1TB | PG FHD Touch
T14 G2: 1145G7 | 32GB | 1TB | FHD
X1C5: 7600U | 16GB | 1TB | FHD
X1C9: 1145G7 | 16GB | 1TB | WUXGA | WWAN
X1Y8: 1365U | 32GB | 1TB | WUXGA
P14s G1 AMD: 4750U | 32GB | 1TB | PG FHD Touch
T14 G2: 1145G7 | 32GB | 1TB | FHD
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- Senior Member
- Posts: 745
- Joined: Fri Sep 21, 2007 11:37 pm
- Location: Downtown Toronto, Canada
Re: UHD panel upgrade T14/T15 gen 2: odd behaviour
I suspect a soft whitelist
ThinkPad P14sgen2 (2021)
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
Re: UHD panel upgrade T14/T15 gen 2: odd behaviour
I think you bought the wrong screen, you must buy the original Lenovo screen, that is, the screen with the FRU number, Lenovo will encrypt its screen, if it is not the original screen, the notebook will not recognize it or appear some strange question.
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- Senior Member
- Posts: 745
- Joined: Fri Sep 21, 2007 11:37 pm
- Location: Downtown Toronto, Canada
Re: UHD panel upgrade T14/T15 gen 2: odd behaviour
incorrect. Whitelists for panels ended with the Tx50 series
but in the newer T1x gen 2 series (2021) models there seems to be a soft whitelist... although I've gotten a QHD and UHD panel to work flawlessly and one UHD panel that gave me issues (Likely an EDID issue)
ThinkPad P14sgen2 (2021)
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
i7-1185G7 | 32+8GB RAM | 1TB Samsung 980 Pro (PCIe 3.0 speed) | UHD upgrade | Glass Touchpad | Intel AX210
The X61 is dead... long live the X61
Past IBM ThinkPads: T480s, T450s, X250, X230, X220, X300, T410, X61s, T60p, T41, X31, T23, A21m
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