"Navin P.S" <navinp1912@gmail.com> čálii:

> On Mon, Jun 6, 2016 at 1:01 PM, Kevin Brubeck Unhammer
> <unhammer@fsfe.org> wrote:
>> Hi,
>>
>> I have a Lenovo A740 (running Xubuntu 16.04) which, with kernel
>> versions >= 4.3.0, tested up until 4.7.0, gives this on trying to boot:
>>
>>   Begin: Waiting for root file system ... Begin: Running
>>   /scripts/local-block ... done.
>>   Begin: Running /scripts/local-block ... done.
>>   Begin: Running /scripts/local-block ... done.
>>   […]
>>   done.
>>   Gave up waiting for root device.
>>
>> and drops me into an (initramfs) shell, where my keyboard is
>> unresponsive. The last kernel I tried which booted fine was 4.2.8.
>>
>> I reported this at https://bugzilla.kernel.org/show_bug.cgi?id=118401
>> and, after some investigation, was asked to contact ahci.c - AHCI SATA
>> support. The attachments in that report show some output from initramfs
>> (using a script in /etc/initramfs-tools/scripts/init-premount due to the
>> keyboard not working).
>>
>> What should I do to keep debugging this issue?
>>
>
> I have been working with Kevin on the bug 118401 .
>
> I'll post the summary.
> The kernel 4.2 works and he is able to boot the system.
> Kernel 4.4 and 4.6, 4.7  drops into initramfs shell for the same uuid.
> Upon further investigation cat /proc/devices showed no block devices
> other than zram and loop.The command /sbin/blkid on 4.6 and later
> didn't give any output whereas on 4.2 it does.
>
> Kernel 4.2 shows the ahci used count is 3
> ahci 36864 3 - Live 0x0000000000000000
> libahci 32768 1 ahci, Live 0x0000000000000000
>
> Where kernel 4.7 doesn't load the ahci module upon boot and upon
> modprobe ahci from the initramfs shell it shows the ahci count as 0.
> So it is not detecting the drive. Not sure why ?
>
> Some more things to note from 4.2 dmesg it prints not sure if it is relevant.
>
> [    0.716610] ahci 0000:00:1f.2: version 3.0
> [    0.716620] ahci 0000:00:1f.2: can't find IRQ for PCI INT B;
> probably buggy MP table
>
> [    0.735267] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 4 ports 6
> Gbps 0x1 impl SATA mode
>
> [    0.746033] ata1: SATA max UDMA/133 abar m2048@0xb5618000 port
> 0xb5618100 irq 44
>
> [    1.068001] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
>
> [    1.134029] ata1.00: ATA-8: ST1000LM014-1EJ164-SSHD-8GB, LIV6, max UDMA/133
> [    1.134030] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
> [    1.178470] ata1.00: configured for UDMA/133
> [    1.178620] scsi 0:0:0:0: Direct-Access     ATA
> ST1000LM014-1EJ1 LIV6 PQ: 0 ANSI: 5
> [    1.178853] sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks:
> (1.00 TB/931 GiB)
> [    1.178855] sd 0:0:0:0: [sda] 4096-byte physical blocks
> [    1.178879] sd 0:0:0:0: [sda] Write Protect is off
> [    1.178881] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
>
>
> where as 4.6 and later doesn't print these messages.dmesg | grep
> ata[0-4] gives no output.
>
> lspci on 4.2 gives this
>
> 00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1
> [AHCI mode] (rev 04) (prog-if 01 [AHCI 1.0])
> Subsystem: Lenovo 8 Series SATA Controller 1 [AHCI mode]
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
> Stepping- SERR- FastB2B- DisINTx+
> Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
> Latency: 0
> Interrupt: pin B routed to IRQ 44
> Region 0: I/O ports at 6088 [size=8]
> Region 1: I/O ports at 6094 [size=4]
> Region 2: I/O ports at 6080 [size=8]
> Region 3: I/O ports at 6090 [size=4]
> Region 4: I/O ports at 6060 [size=32]
> Region 5: Memory at b5618000 (32-bit, non-prefetchable) [size=2K]
> Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
> Address: fee0400c  Data: 4181
> Capabilities: [70] Power Management version 3
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)
> Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
> Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004
> Kernel driver in use: ahci
> Kernel modules: ahci
>
>
> Regards,
> Navin