Windows 7 on HP Pavilion DM1 (2013) with SB820M (AHCI) problem.

[Guest]

Greetings.

My friend wishes to replace Windows 8 with Windows 7, I have put her Windows 7 on a bootable USB stick and turned legacy boot on to enable CSM in UEFI. Everything works fine at this point.

The problem begins when the Windows 7 installer cannot see the HDD and ask to stream appropriate driver. I have tried dozens of SB700 and SB800 drivers, the installer responds that either it:
- did not find any new devices with the provided driver;
- couldn't load the driver, asks to ask vendor for a newer driver.

HP actively declines any Windows 7 support for their computers shipped with Windows 8, after many hours of trying to figure it out I'm turning for help to you.

The chipset: ATI RS880M - AMD M880G with ATI Mobility Radeon™ HD 4225 Southbridge:
SB820M

PCI IDs:
PCI\VEN_1022&DEV_7804&SUBSYS_18D4103C&REV_00
PCI\VEN_1022&DEV_ 7804&SUBSYS_18D4103C
PCI\VEN_1022&DEV_7804&CC_010601
PCI\VEN_1022&DEV_7804&CC_0106

PCI databases name it either "AMD SATA Controller" or "AMD AHCI Compatible RAID Controller",
the BIOS provides no SATA settings, please help and thank you in advance!

 

[digitaldoc]

This all sounds like too much work.

For this much trouble, I would keep Windows 8, and make sure to update it to Windows 8.1. Add ClassicShell software, and can choose the Start button to behave lime in Win 7. Also, have it boot directly to the desktop. With these changes, you have "updated" Win 8 to Win 7.5.

 

[Guest]

Thanks digitaldoc,
I would probably do so if she wasn't not-so-tech-savvy, she just wants Windows 7 she had on the previous laptop. Actually the only problem here is the driver for this particular PCI VEN/DEV/SUBSYS.

The same kind of problem people used to have with then-modern laptops shipped with Vista when they wanted to revert to XP, they too had to find and stream/slipstream newer SATA driver that XP installer was not aware of.
This appears to be an identical issue, just different SATA device.

If you have any suggestions how I could modify the driver's INF file for that device from different laptop manufacturers to match the SUBSYS etc. I would be grateful. I'm willing to go through trouble to achieve that.

Thanks!

 

[digitaldoc]

No idea how to modify the driver from 8 to Win 7. I also did a search for it, and could not find any info on how to do this.

Curious if you can get this to work!