{"id":58884,"date":"2022-10-28T09:06:03","date_gmt":"2022-10-28T13:06:03","guid":{"rendered":"http:\/\/pappp.net\/?guid=b9db7f2fef2636b10a5c27ab89e56ba2"},"modified":"2022-10-28T09:06:03","modified_gmt":"2022-10-28T13:06:03","slug":"linux-6-1-on-nanopi-r4s-on-fixing-sd-card-support-heisenbugs-and-rabbit-holes","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=58884","title":{"rendered":"Linux 6.1 on NanoPi R4S \u2013 On fixing SD-card support, Heisenbugs and Rabbit Holes"},"content":{"rendered":"<p class=\"syndicated-attribution\">Source: <a href=\"https:\/\/kohlschuetter.github.io\/blog\/posts\/2022\/10\/28\/linux-nanopi-r4s\/\">Hacker News<\/a><\/p>\n<div style=\"background-color : #fff7d5;\n\t\t\tborder-width : 1px; padding : 5px; border-style : dashed; border-color : #e7d796;margin-bottom : 1em; color : #9a8c59;\">Article note: It's an excellent tale of a bug hunt. \n\nI spent some time staring into device trees and specifically weird SD\/MMC behavior at the U-Boot to Linux hand-off a few months ago on some Zynq boards... this totally tracks, though I haven't cracked the behavior I was seeing.  In my case, the boards in question have sequenced regulators for 3v3, 1v9, 1v8, and 1v5 and some examples have other issues with the power sequence, so it's a great angle to look at. I should see if the behaviors are related.<\/div><a href=\"https:\/\/news.ycombinator.com\/item?id=33370882\" rel=\"noopener noreferrer\">Comments<\/a>","protected":false},"excerpt":{"rendered":"<p>Comments<\/p>\n<p> <a href=\"https:\/\/pappp.net\/?p=58884\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-58884","post","type-post","status-publish","format-standard","hentry","category-news-2"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/58884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=58884"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/58884\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=58884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=58884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=58884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}