Is there any chance for this bug to be fixed in the next BIOS release? 2016-11-08 19:39 GMT+01:00 Dominik Gronkiewicz <gro...@gmail.com>: > I filed a bug in redhat bugzilla but they rejected it claiming that the > problem is in ACPI of this particular model and the kernel behavior is > correct. I was trying to find the bug report but they probably delete closed > bugs after some time. > > From what I understand, this is not a Fedora-specific bug but rather a > misbehavior of Dell ACPI code. Am I right? > > Is there any more checking that I can do to help fix this issue? > > > 08.11.2016 7:23 PM "Shaun" <shaunst.joh...@yahoo.com> napisał(a): >> >> Send this to fedora as well they should be able to fix it. >> >> Sent from Yahoo Mail on Android >> >> On Tue, Nov 8, 2016 at 12:20 PM, Dominik Gronkiewicz >> <gro...@gmail.com> wrote: >> EQUIPMENT >> >> Dell Inspiron 7537 (2013) >> Intel® Core™ i7-4510U CPU @ 2.00GHz × 4 >> Intel® Haswell Mobile >> >> Kernel 4.8.4 (Fedora 24) >> Kernel boot parameters: >> acpi_osi=Linux acpi_rev_override nouveau.modeset=0 >> rd.driver.blacklist=nouveau rhgb quiet i915.enable_rc6=3 >> i915.enable_fbc=1 i915.semaphores=1 nmi_watchdog=0 pcie_aspm=force >> >> SYMPTOMS >> >> Battery is not detected on system boot with kernel 4.6 or newer >> (worked with 4.5). >> >> [root@dell9 ~]# dmesg | grep batt >> [ 1.248629] ACPI: Battery Slot [BAT0] (battery absent) >> >> It pops up when a brightness up/down key is pressed. >> >> REASON (probably) >> >> Older Linux kernels returned _REV=5, while newer return _REV=2. Dell >> ACPI (I tested all available BIOS versions from A09 to A13) will >> detect battery for Linux only if it gets _REV=5 from the kernel. >> >> More reading (with very detailed analysis): >> https://bugzilla.kernel.org/show_bug.cgi?id=105721#c19 >> >> WORKAROUND >> >> Use acpi_rev_override option which makes kernel return _REV=5 in old >> fashion. It works requires compiling own kernel (this option is NOT >> compiled into kernel by default) which is pain if you want to keep the >> system up-to-date. >> >> POSSIBLE SOLUTION (?) >> >> Abandon _REV=5 checking in DELL ACPI. >> >> I am not sure if my view on this issue is correct (i'm nowhere close >> to a specialist), but if so, I hope this bug is eventually fixed. >> >> Sorry if this bug has been reported already, I'm new to this list and >> I don't know how to browse the list archive. >> >> Dominik >> >> _______________________________________________ >> Linux-Desktops mailing list >> Linux-Desktops@dell.com >> https://lists.us.dell.com/mailman/listinfo/linux-desktops >> Please read the FAQ at http://lists.us.dell.com/faq
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