Re: Samsung SSD 870 QVO LPM issues

[Niklas Cassel <cassel@kernel.org>]

On Wed, Feb 05, 2025 at 09:37:59AM +0100, Niklas Cassel wrote:
> Hello Daniel, Dieter,
> 
> Dieter recently submitted an issue on bugzilla that v6.14-rc1
> breaks entering lower power packages states:
> https://bugzilla.kernel.org/show_bug.cgi?id=219747
> 
> Most likely, the problem is caused by Daniel's recent commit:
> cc77e2ce187d ("ata: libata-core: Add ATA_QUIRK_NOLPM for Samsung SSD 870
> QVO drives")
> 
> Dieter is using 'Samsung SSD 870 QVO 8TB', rev 'SVQ02B6Q'.
> 
> No longer being able to enter lower package states, suggests that
> LPM was previously working for Dieter's Samsung SSD 870 QVO drives.
> 
> Daniel claimed that enabling LPM for his Samsung SSD 870 QVO drive,
> caused them to stop working.
> 
> 
> Could it be that you guys are running different firmware versions on
> your Samsung SSD 870 QVO drives, and that Samsung has managed to fix
> their LPM issues in more recent firmware updates?
> 
> It seems like Dieter is using firmware 'SVQ02B6Q'
> which also seems to be the latest when looking at:
> https://semiconductor.samsung.com/consumer-storage/support/tools/
> 
> Daniel, could you please tell us which firmware version you are using?
> 
> We might have to adjust the QUIRK to only apply for the firmware version
> that you are using.
> 
> It could also be interesting to see if you could update the firmware on
> your drive, and revert the quirk, and see if LPM is working for you with
> the latest firmware version.

Hello Daniel,

Could you please provide which firmware version you are using.

If not, I do not see any other option but to revert your patch.


Kind regards,
Niklas