On Thu, May 31, 2018 at 01:21:07PM +0200, Hans de Goede wrote: > Commit 184add2ca23c ("libata: Apply NOLPM quirk for SanDisk > SD7UB3Q*G1001 SSDs") disabled LPM for SanDisk SD7UB3Q*G1001 SSDs. > > This has lead to several reports of users of that SSD where LPM > was working fine and who know have a significantly increased idle > power consumption on their laptops. > > Likely there is another problem on the T450s from the original > reporter which gets exposed by the uncore reaching deeper sleep > states (higher PC-states) due to LPM being enabled. The problem as > reported, a hardfreeze about once a day, already did not sound like > it would be caused by LPM and the reports of the SSD working fine > confirm this. The original reporter is ok with dropping the quirk. > > A X250 user has reported the same hard freeze problem and for him > the problem went away after unrelated updates, I suspect some GPU > driver stack changes fixed things. > > TL;DR: The original reporters problem were triggered by LPM but not > an LPM issue, so drop the quirk for the SSD in question. > > BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1583207 > Cc: stable@xxxxxxxxxxxxxxx > Cc: Richard W.M. Jones <rjones@xxxxxxxxxx> > Cc: Lorenzo Dalrio <lorenzo.dalrio@xxxxxxxxx> > Reported-by: Lorenzo Dalrio <lorenzo.dalrio@xxxxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Applied to libata/for-4.17-fixes. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html