downlord Posted February 22, 2017 Share Posted February 22, 2017 Hi Tluck, Bios is 1.46, I will try today a CMOS reset. Good idea. Video glitches: it happens about every 2 minutes, a short blackout of the external screen, linked via DP to the T420, like a short interruption in the signal. Never had the problem before. Internal screen has no problems. Hardware seems ok. Link to comment Share on other sites More sharing options...
jiivee82 Posted February 22, 2017 Share Posted February 22, 2017 With the last Chameleon 3994 I've got sometimes the error: Bad CMOS Checksum, at boot I started occasionally getting that after flashing to modded 1.46, but it went away after tweaking some BIOS options. After flashing the BIOS my external USB keyboard and mouse stopped working in BIOS and Clover menu though. Has anyone gotten wake from USB keyboard/mouse with this T420 setup working by the way? I've tried tweaking the USB options in config.plist (as per googling the issue) but no dice so far. Only wakes up from Fn-key on the laptops own keyboard. Link to comment Share on other sites More sharing options...
tluck Posted February 22, 2017 Share Posted February 22, 2017 @gpspl - ok . will look into this older method when i have time. i take it, this is working for you better? what is patch "13" exactly ... is this it: graphics_PNLF_ivy_sandy.txt ? if so, thats good as this patch for PNLF was the DSDT back in the Yosemite (and before) days. but when ACPI broke, rehabMan developed the IntelBackLight approach. and that worked for 2 years now. Link to comment Share on other sites More sharing options...
downlord Posted February 22, 2017 Share Posted February 22, 2017 @jiivee82 Have the same issues with USB KJeyboard and Mouse in BIOS and Clover boot menu, actually the USB Keyboard never worked. Somebody experiencing the same? Is there a 1.46 BIOS version around without this issues? EDIT: Do you remember the tweaks on the BIOS to overcome the bad checksum? Link to comment Share on other sites More sharing options...
jiivee82 Posted February 22, 2017 Share Posted February 22, 2017 @jiivee82 Have the same issues with USB KJeyboard and Mouse in BIOS and Clover boot menu, actually the USB Keyboard never worked. Somebody experiencing the same? Is there a 1.46 BIOS version around without this issues? EDIT: Do you remember the tweaks on the BIOS to overcome the bad checksum? Don't remember what exactly, but I was trying to fix the keyboard/mouse-issue, so something USB/power-related probably. Link to comment Share on other sites More sharing options...
tluck Posted February 22, 2017 Share Posted February 22, 2017 (edited) well good news. there seems to be a brightness fix for 10.12.4 ... Turns out to be simple matter of each person creating the Injector to match your Panel to get full range. The brightness change is not as smooth on the transitions as with IntelBacklight.kext but there is a full brightness range. and no DSDT edits needed for me. i'll post a new zip with the script to create the injector later today. Edited February 23, 2017 by tluck 4 Link to comment Share on other sites More sharing options...
Fibroga Posted February 23, 2017 Share Posted February 23, 2017 Can i install something for read/write USB ntfs formatted? Link to comment Share on other sites More sharing options...
Tetonne Posted February 23, 2017 Share Posted February 23, 2017 Can i install something for read/write USB ntfs formatted? Yes NTFS EFI driver Link to comment Share on other sites More sharing options...
pitx0n Posted February 24, 2017 Share Posted February 24, 2017 1.49 bios mod. Whitelist and hidden menu. Try at your own risk Lenovo T420 v1.49 mod.7z Link to comment Share on other sites More sharing options...
vusun123 Posted February 24, 2017 Share Posted February 24, 2017 1.49 bios mod. Whitelist and hidden menu. Try at your own risk You haven't tested it ? Link to comment Share on other sites More sharing options...
tluck Posted February 24, 2017 Share Posted February 24, 2017 In prep for 10.12.4 with brightness changes, I updated the zip and added RehabMan's AppleBackLight Injector method. There is an Injector in the kext/Other folder which matches my LCD model 02e2 - which is an LG (or as it shows in the EDID 30e4e202) - I modified the script and Panel template to match the max of the SandyBridge framebuffer and scales brightness in 17 steps from 0 to 4882 (0x1312). - This method (and kext) will replace the IntelBacklight.kext. Note: the real nice and smooth transitions are gone but we get a nice full range again. No additional DSDT patching was needed. Please let me know if 1.49 modded bios is working. i don't really need it but it would be good to know that it is not risky. 1 Link to comment Share on other sites More sharing options...
Fibroga Posted February 24, 2017 Share Posted February 24, 2017 the only way to wake the touchpad after the sleep, is to restart? Link to comment Share on other sites More sharing options...
pitx0n Posted February 25, 2017 Share Posted February 25, 2017 You haven't tested it ? I tried it on a T420 with a corrupted 1.49 original BIOS and it shows hidden menu and the short beeps from the security chip once flashed. So, yes. I assume it works. 1 Link to comment Share on other sites More sharing options...
149113 Posted February 25, 2017 Share Posted February 25, 2017 Decided to do a fresh install on my T520 using a 10.12.3 image. Cannot get to the installer. Screen shot below when running in verbose boot mode. The T520 has modded bios 1.45 (latest I could find with a whitelist). The progress bar on the apple boot screen makes it to the end and the activity light still flickers but will not launch into setup. Any suggestions? Link to comment Share on other sites More sharing options...
tluck Posted February 26, 2017 Share Posted February 26, 2017 no idea. the screen shot doesn't provide any help. does the installer have the same Clover ESP as from the HD? Link to comment Share on other sites More sharing options...
TheChuckster Posted February 26, 2017 Share Posted February 26, 2017 Any way to turn down the trackpoint sensitivity? Mine still flies across the screen with even the lightest touch. Also, if I sleep and wake up the laptop, sometimes the trackpoint and trackpoint buttons stop working all together.I wasn't able to find a way to search for text "trackpoint" within just this specific topic (most forum software has a within-topic search), only the whole forums, so sorry if I am asking something that has already been resolved. Link to comment Share on other sites More sharing options...
149113 Posted February 26, 2017 Share Posted February 26, 2017 no idea. the screen shot doesn't provide any help. does the installer have the same Clover ESP as from the HD? No, I took the one from the latest .zip file and copied that to the USB installer. I'm installing this as a fresh install to a new mSATA drive. Has anyone used the 10.12.3 build with the T420 folder to do a new install? Edit: I ended needing to replace the DSDT files in the EFI folder with ones from a T520. That was only way I could get the USB to boot to the install screen Link to comment Share on other sites More sharing options...
tluck Posted February 26, 2017 Share Posted February 26, 2017 @149113 - well sure the DSDT in the zip is just for T420. @TheChuckster -what is your system? are you using the DSDT from the Zip that provides an identifier for T420? The VoodooPS2 kexts will then match to this model identifier and will use a modified set of parameters to fix TrackPoint/TrackPad speeds etc. Link to comment Share on other sites More sharing options...
pitx0n Posted February 26, 2017 Share Posted February 26, 2017 No, I took the one from the latest .zip file and copied that to the USB installer. I'm installing this as a fresh install to a new mSATA drive. Has anyone used the 10.12.3 build with the T420 folder to do a new install? Edit: I ended needing to replace the DSDT files in the EFI folder with ones from a T520. That was only way I could get the USB to boot to the install screen I was able to get a working 10.11.6 T520 with these files including DSDT. I just rename matched resolution config.plist to install it. Have you tried to install to a standard SATA drive? Can you upload that DSDT to try it? Link to comment Share on other sites More sharing options...
tluck Posted February 26, 2017 Share Posted February 26, 2017 Please Please Please - add your system info into your signature. helps cut down on me asking and often explains why there is an issue. Link to comment Share on other sites More sharing options...
149113 Posted February 27, 2017 Share Posted February 27, 2017 I was able to get a working 10.11.6 T520 with these files including DSDT. I just rename matched resolution config.plist to install it. Have you tried to install to a standard SATA drive? Can you upload that DSDT to try it? Here's the one that I created for my T520. It was the only thing I changed to get it to boot. Everything is up and running now with no issues. I don't remember changing that for El Capitan but that was a long time ago. DSDT.rar Link to comment Share on other sites More sharing options...
Zandig Posted February 27, 2017 Share Posted February 27, 2017 Modded 1.48, has all the good stuff like the modded 1.46. Lenovo T420 420i v1_48 OAM_NWL_AES-NI_MSR_0xE2_Unlocked_memory_speed_vbios_intel_2119.rar Same as above, but with even more recent Intel VBIOS 2170. Lenovo T420 420i v1_48 OAM_NWL_AES-NI_MSR_0xE2_Unlocked_memory_speed_vbios_intel_2170.rar 1 Link to comment Share on other sites More sharing options...
pitx0n Posted February 27, 2017 Share Posted February 27, 2017 Here's the one that I created for my T520. It was the only thing I changed to get it to boot. Everything is up and running now with no issues. I don't remember changing that for El Capitan but that was a long time ago. Thank you. I'll try it with sierra. Link to comment Share on other sites More sharing options...
wijatka Posted February 28, 2017 Share Posted February 28, 2017 Can I install El Capitan using these files? Was the DSDT changed between El Capitan and Sierra? If no, could anyone upload for me files for El Capitan? I don't want to use Sierra now. Link to comment Share on other sites More sharing options...
Ilya_Demidov Posted February 28, 2017 Share Posted February 28, 2017 tluck, Thank you so much for this guide! It was super easy to make dualboot Mac/Win on my t420. I ordered compatible MacOS wi-fi module on ebay, but found a cheap solution for now: I use USB wi-fi dongle D-link DWA-131, just for 5 $. Works flawlessly! Thank you once again! Link to comment Share on other sites More sharing options...
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