{"id":1244,"date":"2014-12-04T21:19:07","date_gmt":"2014-12-04T21:19:07","guid":{"rendered":"http:\/\/rglinuxtech.com\/?p=1244"},"modified":"2014-12-04T21:21:09","modified_gmt":"2014-12-04T21:21:09","slug":"arm-odroid-u3-and-kernel-3-18-rc7-still-unstable","status":"publish","type":"post","link":"https:\/\/rglinuxtech.com\/?p=1244","title":{"rendered":"ARM – Odroid U3 and Kernel 3.18-rc7 – Still Unstable.."},"content":{"rendered":"

I have managed to get Kernel 3.18-rc7<\/strong> to boot on my Odroid U3<\/strong>, but it is still very unstable..<\/p>\n

Fedora release 21 (Twenty One)<\/strong>\r\nKernel 3.18.0-rc7 on an armv7l (ttySAC1)\r\nrgodroid login:\r\n$ uname -a<\/strong>\r\nLinux rgodroid 3.18.0-rc7 #3 SMP PREEMPT Wed Dec 3 18:41:29 EST 2014 armv7l armv7l armv7l GNU\/Linux<\/strong><\/pre>\n
Sometimes the device will boot without detecting the USB-connected Ethernet port (smsc95xx<\/em><\/strong>), and at other times it will be detected – and nothing has been changed between boot attempts..<\/p>\n
The system still ‘tombstones’ at irregular intervals:<\/p>\n
[ 69.610957] BUG: sleeping function called from invalid context at kernel\/locking\/mutex.c:97<\/strong>\r\n[ 69.613715] in_atomic(): 1, irqs_disabled(): 128, pid: 79, name: mmcqd\/0<\/strong>\r\n[ 69.620379] Preemption disabled at:[< (null)>] (null)\r\n\r\n[ 69.627151] CPU: 0 PID: 79 Comm: mmcqd\/0 Tainted: G W 3.18.0-rc7 #3<\/strong>\r\n[ 69.634463] [<c001991c>] (unwind_backtrace) from [<c00140d8>] (show_stack+0x20\/0x24)<\/strong>\r\n[ 69.642176] [<c00140d8>] (show_stack) from [<c06f7ec8>] (dump_stack+0x90\/0xd0)<\/strong>\r\n[ 69.649387] [<c06f7ec8>] (dump_stack) from [<c004f4e0>] (__might_sleep+0x16c\/0x174)<\/strong>\r\n[ 69.657019] [<c004f4e0>] (__might_sleep) from [<c06fc2b8>] (mutex_lock+0x2c\/0x4c)<\/strong>\r\n[ 69.664479] [<c06fc2b8>] (mutex_lock) from [<c055f1a8>] (clk_prepare_lock+0x7c\/0x104)<\/strong>\r\n[ 69.672291] [<c055f1a8>] (clk_prepare_lock) from [<c05611cc>] (clk_set_rate+0x24\/0xdc)<\/strong>\r\n[ 69.680189] [<c05611cc>] (clk_set_rate) from [<c05409c8>] (sdhci_cmu_set_clock+0x78\/0x150)<\/strong>\r\n[ 69.688446] [<c05409c8>] (sdhci_cmu_set_clock) from [<c053c3f4>] (sdhci_do_set_ios+0x148\/0x63c)<\/strong>\r\n[ 69.697116] [<c053c3f4>] (sdhci_do_set_ios) from [<c053c1fc>] (sdhci_set_ios+0x38\/0x48)<\/strong>\r\n[ 69.705107] [<c053c1fc>] (sdhci_set_ios) from [<c05288a0>] (__mmc_set_clock+0xd4\/0x118)<\/strong>\r\n[ 69.713093] [<c05288a0>] (__mmc_set_clock) from [<c0528950>] (mmc_ungate_clock+0x34\/0x38)<\/strong>\r\n[ 69.721251] [<c0528950>] (mmc_ungate_clock) from [<c052b9dc>] (mmc_host_clk_hold+0x5c\/0xc0)<\/strong>\r\n[ 69.729582] [<c052b9dc>] (mmc_host_clk_hold) from [<c0526af8>] (mmc_start_request+0x218\/0x250)<\/strong>\r\n[ 69.738174] [<c0526af8>] (mmc_start_request) from [<c052822c>] (mmc_start_req+0x2fc\/0x388)<\/strong>\r\n[ 69.746420] [<c052822c>] (mmc_start_req) from [<c05383d4>] (mmc_blk_issue_rw_rq+0x3f4\/0xa6c)<\/strong>\r\n[ 69.754840] [<c05383d4>] (mmc_blk_issue_rw_rq) from [<c0538e78>] (mmc_blk_issue_rq+0x42c\/0x50c)<\/strong>\r\n[ 69.763519] [<c0538e78>] (mmc_blk_issue_rq) from [<c0539f74>] (mmc_queue_thread+0xbc\/0x168)<\/strong>\r\n[ 69.771863] [<c0539f74>] (mmc_queue_thread) from [<c0048168>] (kthread+0xec\/0xf4)<\/strong>\r\n[ 69.779327] [<c0048168>] (kthread) from [<c000fa58>] (ret_from_fork+0x14\/0x20)<\/strong><\/pre>\n
And…\u00a0 The most annoying thing is that the fan is running constantly!\u00a0\u00a0\u00a0 I have pwm-fan<\/em> configured in, but it appears to have no effect..<\/p>\n
I will keep testing, and hopefully 3.19-rc will bring some improvements..\u00a0\u00a0\u00a0 Patches for this device seem to be around, now, but appear to be slow in acceptance into the actual kernel.org kernel codebase..<\/p>\n
Robert Gadsdon.\u00a0\u00a0 December 4, 2014.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"
I have managed to get Kernel 3.18-rc7 to boot on my Odroid U3, but it is still very unstable.. Fedora release 21 (Twenty One) Kernel 3.18.0-rc7 on an armv7l (ttySAC1) rgodroid login: $ uname -a Linux rgodroid 3.18.0-rc7 #3 SMP PREEMPT Wed Dec 3 18:41:29 EST 2014 armv7l armv7l armv7l GNU\/Linux Sometimes the device will boot without …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[91,5,6,14,16,794,19,20],"tags":[1174,101,958,956,242,795,362,378],"class_list":["post-1244","post","type-post","status-publish","format-standard","hentry","category-arm","category-compilation","category-crash-and-burn","category-kernel","category-linux-arm","category-odroid","category-opinion","category-performance-2","tag-arm","tag-boot","tag-fan-running","tag-kernel-3-18-rc7","tag-linux","tag-odroid-u3","tag-testing","tag-unstable"],"_links":{"self":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1244","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1244"}],"version-history":[{"count":3,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1244\/revisions"}],"predecessor-version":[{"id":1247,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=\/wp\/v2\/posts\/1244\/revisions\/1247"}],"wp:attachment":[{"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rglinuxtech.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}