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Re: [Libreboot] libreboot first-impressions


From: Robert Alessi
Subject: Re: [Libreboot] libreboot first-impressions
Date: Wed, 7 Jan 2015 21:47:34 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

On Wed, Jan 07, 2015 at 07:31:54PM +0100, Michał Masłowski wrote:
> Please write what errors or output it wrote when it "refused to start".
Errors/output read as follows:

1. systemctl -l status powertop.service

● powertop.service - Powertop tunings
   Loaded: loaded (/etc/systemd/system/powertop.service; enabled; vendor 
preset: disabled)
   Active: failed (Result: core-dump) since mer. 2015-01-07 21:07:26 CET; 2min 
9s ago
  Process: 503 ExecStart=/usr/bin/powertop --auto-tune (code=dumped, 
signal=ABRT)
 Main PID: 503 (code=dumped, signal=ABRT)

janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: Cannot load from file 
/var/cache/powertop/saved_parameters.powertop
janv. 07 21:07:26 kiddo powertop[503]: Leaving PowerTOP
janv. 07 21:07:26 kiddo systemd[1]: powertop.service: main process exited, 
code=dumped, status=6/ABRT
janv. 07 21:07:26 kiddo systemd[1]: Failed to start Powertop tunings.
janv. 07 21:07:26 kiddo systemd[1]: Unit powertop.service entered failed state.
janv. 07 21:07:26 kiddo systemd[1]: powertop.service failed.
janv. 07 21:07:26 kiddo systemd-coredump[632]: Process 503 (powertop) of user 0 
dumped core.

2. journalctl _PID=503

janv. 07 21:07:24 kiddo powertop[503]: Loaded 0 prior measurements
janv. 07 21:07:24 kiddo powertop[503]: Devfreq not enabled
janv. 07 21:07:24 kiddo powertop[503]: unknown op '{'
janv. 07 21:07:26 kiddo powertop[503]: *** Error in `/usr/bin/powertop': double 
free or corruption (!prev): 0x086373b0 ***
janv. 07 21:07:26 kiddo powertop[503]: ======= Backtrace: =========
janv. 07 21:07:26 kiddo powertop[503]: /usr/lib/libc.so.6(+0x6b5c9)[0xb73a55c9]
janv. 07 21:07:26 kiddo powertop[503]: /usr/lib/libc.so.6(+0x71217)[0xb73ab217]
janv. 07 21:07:26 kiddo powertop[503]: /usr/lib/libc.so.6(+0x719ed)[0xb73ab9ed]
janv. 07 21:07:26 kiddo powertop[503]: 
/usr/lib/libstdc++.so.6(_ZdlPv+0x18)[0xb75a5f98]
janv. 07 21:07:26 kiddo powertop[503]: /usr/lib/libc.so.6(+0x2eb33)[0xb7368b33]
janv. 07 21:07:26 kiddo powertop[503]: /usr/lib/libc.so.6(+0x2eb91)[0xb7368b91]
janv. 07 21:07:26 kiddo powertop[503]: 
/usr/lib/libc.so.6(__libc_start_main+0xea)[0xb7351e6a]
janv. 07 21:07:26 kiddo powertop[503]: /usr/bin/powertop[0x804e39d]
janv. 07 21:07:26 kiddo powertop[503]: ======= Memory map: ========
janv. 07 21:07:26 kiddo powertop[503]: 08048000-080bb000 r-xp 00000000 fe:02 
1870940    /usr/bin/powertop
janv. 07 21:07:26 kiddo powertop[503]: 080bb000-080bc000 r--p 00072000 fe:02 
1870940    /usr/bin/powertop
janv. 07 21:07:26 kiddo powertop[503]: 080bc000-080bd000 rw-p 00073000 fe:02 
1870940    /usr/bin/powertop
janv. 07 21:07:26 kiddo powertop[503]: 080bd000-080bf000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: 085ee000-08d3c000 rw-p 00000000 00:00 0  
        [heap]
janv. 07 21:07:26 kiddo powertop[503]: b7194000-b731e000 r--p 00000000 fe:02 
1855373    /usr/lib/locale/locale-archive
janv. 07 21:07:26 kiddo powertop[503]: b731e000-b7321000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b7321000-b7335000 r-xp 00000000 fe:02 
1838233    /usr/lib/libresolv-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b7335000-b7337000 r--p 00013000 fe:02 
1838233    /usr/lib/libresolv-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b7337000-b7338000 rw-p 00015000 fe:02 
1838233    /usr/lib/libresolv-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b7338000-b733a000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b733a000-b74eb000 r-xp 00000000 fe:02 
1838261    /usr/lib/libc-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b74eb000-b74ef000 r--p 001b0000 fe:02 
1838261    /usr/lib/libc-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b74ef000-b74f1000 rw-p 001b4000 fe:02 
1838261    /usr/lib/libc-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b74f1000-b74f3000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b74f3000-b750f000 r-xp 00000000 fe:02 
1838676    /usr/lib/libgcc_s.so.1
janv. 07 21:07:26 kiddo powertop[503]: b750f000-b7510000 rw-p 0001b000 fe:02 
1838676    /usr/lib/libgcc_s.so.1
janv. 07 21:07:26 kiddo powertop[503]: b7510000-b755b000 r-xp 00000000 fe:02 
1838260    /usr/lib/libm-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b755b000-b755c000 r--p 0004a000 fe:02 
1838260    /usr/lib/libm-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b755c000-b755d000 rw-p 0004b000 fe:02 
1838260    /usr/lib/libm-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b755d000-b7646000 r-xp 00000000 fe:02 
1838681    /usr/lib/libstdc++.so.6.0.20
janv. 07 21:07:26 kiddo powertop[503]: b7646000-b764a000 r--p 000e9000 fe:02 
1838681    /usr/lib/libstdc++.so.6.0.20
janv. 07 21:07:26 kiddo powertop[503]: b764a000-b764b000 rw-p 000ed000 fe:02 
1838681    /usr/lib/libstdc++.so.6.0.20
janv. 07 21:07:26 kiddo powertop[503]: b764b000-b7653000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b7653000-b766b000 r-xp 00000000 fe:02 
1838240    /usr/lib/libpthread-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b766b000-b766c000 r--p 00017000 fe:02 
1838240    /usr/lib/libpthread-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b766c000-b766d000 rw-p 00018000 fe:02 
1838240    /usr/lib/libpthread-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b766d000-b766f000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b766f000-b767b000 r-xp 00000000 fe:02 
1853382    /usr/lib/libpci.so.3.3.0
janv. 07 21:07:26 kiddo powertop[503]: b767b000-b767c000 r--p 0000b000 fe:02 
1853382    /usr/lib/libpci.so.3.3.0
janv. 07 21:07:26 kiddo powertop[503]: b767c000-b767d000 rw-p 0000c000 fe:02 
1853382    /usr/lib/libpci.so.3.3.0
janv. 07 21:07:26 kiddo powertop[503]: b767d000-b76df000 r-xp 00000000 fe:02 
1838727    /usr/lib/libncursesw.so.5.9
janv. 07 21:07:26 kiddo powertop[503]: b76df000-b76e1000 r--p 00062000 fe:02 
1838727    /usr/lib/libncursesw.so.5.9
janv. 07 21:07:26 kiddo powertop[503]: b76e1000-b76e2000 rw-p 00064000 fe:02 
1838727    /usr/lib/libncursesw.so.5.9
janv. 07 21:07:26 kiddo powertop[503]: b76e2000-b7700000 r-xp 00000000 fe:02 
1854779    /usr/lib/libnl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7700000-b7701000 r--p 0001d000 fe:02 
1854779    /usr/lib/libnl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7701000-b7702000 rw-p 0001e000 fe:02 
1854779    /usr/lib/libnl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7702000-b7707000 r-xp 00000000 fe:02 
1854780    /usr/lib/libnl-genl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7707000-b7708000 r--p 00004000 fe:02 
1854780    /usr/lib/libnl-genl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7708000-b7709000 rw-p 00005000 fe:02 
1854780    /usr/lib/libnl-genl-3.so.200.20.0
janv. 07 21:07:26 kiddo powertop[503]: b7738000-b773b000 rw-p 00000000 00:00 0
janv. 07 21:07:26 kiddo powertop[503]: b773b000-b773d000 r--p 00000000 00:00 0  
        [vvar]
janv. 07 21:07:26 kiddo powertop[503]: b773d000-b773e000 r-xp 00000000 00:00 0  
        [vdso]
janv. 07 21:07:26 kiddo powertop[503]: b773e000-b775f000 r-xp 00000000 fe:02 
1838237    /usr/lib/ld-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b775f000-b7760000 r--p 00021000 fe:02 
1838237    /usr/lib/ld-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: b7760000-b7761000 rw-p 00022000 fe:02 
1838237    /usr/lib/ld-2.20.so
janv. 07 21:07:26 kiddo powertop[503]: bfcf8000-bfd19000 rw-p 00000000 00:00 0  
        [stack]
janv. 07 21:07:26 kiddo powertop[503]: Cannot load from file 
/var/cache/powertop/saved_parameters.powertop
janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: RAPL device for cpu 0
janv. 07 21:07:26 kiddo powertop[503]: Cannot load from file 
/var/cache/powertop/saved_parameters.powertop
janv. 07 21:07:26 kiddo powertop[503]: Leaving PowerTOP

> 
> I have observed the noise when the backlight PWM frequency is too high
> at non-100% brightness, I think current libreboot versions wouldn't have
> this bug (Francis gets uneven brightness when this occurs).  I don't
> know how your two kernel versions differ in backlight handling.

I have sent almost the same observations to the libreboot-dev list,
but I didn't try the 'unstable/untested' release of Libreboot yet.  As
a matter of fact, linux-libre-lts kernel gives by far better results
than linux-libre.  With the former and tlp, I have no noise at all,
whatever the percentage of brightness.  Besides, with the latter I
cannot anymore go into and come from hibernate.  So switching to
linux-libre-lts fixed both of the issues.

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