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 > <https://overview.mail.yahoo.com/mobile/?.src=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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