** Tags removed: verification-needed-bionic verification-needed-focal
** Tags added: verification-done-bionic verification-done-focal
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** Tags removed: verification-needed-eoan
** Tags added: verification-done-eoan
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Title:
The thread level parallelism would be a bott
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
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ification is only in replacing the write lock to a read one. And
there is no modification inside the loop. The regression probability is
low.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: New
** Tags: sts
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Hi Joshua,
I just reviewed the commit Joseph provided in the launchpad. It's the
same as the two patches I backported.
eb4c2382272a srcu: Lock srcu_data structure in srcu_gp_start()
d633198088bd srcu: Prohibit call_srcu() use under raw spinlocks
The commit id eb4c2382272a is the latest linux-nex
** Changed in: linux (Ubuntu Xenial)
Assignee: Guilherme G. Piccoli (gpiccoli) => Gavin Guo (mimi0213kimo)
** Changed in: linux (Ubuntu)
Assignee: Guilherme G. Piccoli (gpiccoli) => Gavin Guo (mimi0213kimo)
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** Tags removed: verification-needed-bionic verification-needed-cosmic
verification-needed-xenial
** Tags added: verification-done-bionic verification-done-cosmic
verification-done-xenial
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** Description changed:
- [267265.140511] BUG: unable to handle kernel NULL pointer dereference at
0020
- [267265.144406] IP: xfrm_lookup+0x31/0x870
- [267265.146224] PGD 0 P4D 0
- [267265.147469] Oops: [#1] SMP PTI
- [267265.149141] Modules linked in: xt_iprange xt_nat ipt_M
Assignee: Gavin Guo (mimi0213kimo)
Status: Incomplete
** Tags: bionic
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Title:
NULL pointer dereference at
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Title:
The VM hang happens because of pending i
** Description changed:
- VM hang because of pening interrups not reinjected.
+ [Impact]
+
+ After the VM(Guest OS is Windows Server 2012R2) has been live-migrated
+ several times, the screen is blacked out or freeze when the VM is
+ connected via VNC.
+
+ The Windows Guest OS Server has been in
Public bug reported:
VM hang because of pening interrups not reinjected.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: Incomplete
** Tags: sts
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Title:
The kernel NULL pointer dereference happ
** Summary changed:
- The kernel NULL pointer dereference happens when accessing the task by
task_cpu() in function cpuacct_charge()
+ The kernel NULL pointer dereference happens when accessing the task_struct by
task_cpu() in function cpuacct_charge()
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d by the Qemu and cannot be reproduced.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: Incomplete
** Tags: sts xenial
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** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1771480/+attachment/5140100/+files/kern.log
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This occurred during the deployment of the DPDK compute. The DPDK was
not deployed. The bond0 and bond1 configuration appears to have failed.
---8<---
Preliminary analysis: the LRO appears to be off after the kernel traces,
despite the message. I am inquiring as to the nature of t
Public bug reported:
I have multiple instances of this dev_disable_lro error in kern.log. Also
seeing this:
systemd-udevd[1452]: timeout: killing 'bridge-network-interface' [2765]
<4>May 1 22:56:42 xxx kernel: [ 404.520990] bonding: bond0: Warning: No 802.3ad
response from the link partner for
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Title:
OOM and High CPU utilization in update_b
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: Incomplete
** Tags: sts
** Attachment added: "flamegraph of the high CPU utilization symptom"
https://bugs.launchpad.net/bugs/1747896/+attachment/5050575/+files/2018-01-31_07-38-45.perf.data.svg
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** Tags removed: verification-needed-artful verification-needed-zesty
** Tags added: verification-done-artful verification-done-zesty
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** Tags removed: verification-needed-xenial
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Title:
Device hotplugging with MPT SAS cannot w
** Tags removed: verification-needed-xenial verification-needed-zesty
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failed to detect new drives from within a VMWare ESXi
environment.
[Test]
The patch has been verified based on the Ubuntu kernel v4.4.0-97.120.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: New
** Tags: sts
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** Description changed:
[Impact]
The frequent kernel errors can be see inside the XFS based OSD
processes and it causes to crash and restart.
BUG: unable to handle kernel NULL pointer dereference at 00a0
IP: [] xfs_da3_node_read+0x30/0xb0 [xfs]
CPU: 8 PID: 2855031 Comm:
to proceed.
[Test]
The patch has been tested.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: New
** Tags: sts
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Title:
Migrating KSM page causes the VM lock up
** Tags removed: verification-needed-zesty
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Title:
Migrating KSM page causes the VM lock up a
@Joseph Salisbury,
Yes, Jorge has identified the bug and will send out the SRU patches.
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Title:
net/ipv4: original ingress device i
** Description changed:
[Impact]
After numad is enabled and there are several VMs running on the same
host machine(host kernel version: 4.4.0-72-generic #93), the
softlockup messages can be observed inside the VMs' dmesg.
First, the crashdump was captured when the symptom was observed
** Description changed:
[Impact]
After numad is enabled and there are several VMs running on the same
host machine(host kernel version: 4.4.0-72-generic #93), the
softlockup messages can be observed inside the VMs' dmesg.
First, the crashdump was captured when the symptom was observed
** Description changed:
+ [Impact]
After numad is enabled and there are several VMs running on the same
host machine(host kernel version: 4.4.0-72-generic #93), the
softlockup messages can be observed inside the VMs' dmesg.
First, the crashdump was captured when the symptom was observed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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Title:
Migrating KSM page causes the VM l
** Description changed:
After numad is enabled and there are several VMs running on the same
- host machine, the softlockup messages can be observed inside the VMs'
- dmesg.
+ host machine(host kernel version: 4.4.0-72-generic #93), the
+ softlockup messages can be observed inside the VMs' dmesg
Public bug reported:
After numad is enabled and there are several VMs running on the same
host machine(host kernel version: 4.4.0-72-generic #93), the
softlockup messages can be observed inside the VMs' dmesg.
First, the crashdump was captured when the symptom was observed. At
the first glance, i
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
(backported from commit d6d86c0a7f8ddc5b38cf089222cb1d9540762dc2)
Signed-off-by: Gavin Guo
Conflicts:
mm/balloon_compaction.c
mm/migrate.c
Acked-by: Stefan Bader
S
** Changed in: linux (Ubuntu Trusty)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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stress test on the v3.13.0-89.136 with KASan backported.
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1572562/+attachment/4685474/+files/kern.log
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I tried to reproduce the bug with the following commands:
"./parallel-73670.sh -r 2 -k 40" [1]
The error messages cannot be found in the dmesg with the proposed kernel
3.13.0-89.136 with KASan backported[2].
Reference:
[1]. http://kernel.ubuntu.com/git/gavinguo/stress-test.git/
[2].
http://ke
** Description changed:
[Impact]
In the v3.13.0-76 kernel with KASan backported.
The following error message could be observed during the kernel
building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40"
That means building 40 kernels in the same time with 2 rounds.
Ba
** Description changed:
[Impact]
In the v3.13.0-76 kernel with KASan backported.
The following error message could be observed during the kernel
building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40"
That means building 40 kernels in the same time with 2 rounds.
Ba
** Description changed:
+ [Impact]
In the v3.13.0-76 kernel with KASan backported.
The following error message could be observed during the kernel
building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40"
That means building 40 kernels in the same time with 2 rounds.
Ba
11 {
312 return ((1UL << (nr & (BITS_PER_LONG-1))) &
313 (addr[nr >> _BITOPS_LONG_SHIFT])) != 0;
314 }
+
+ Reference:
+ [1]. http://kernel.ubuntu.com/git/gavinguo/stress-test.git/
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gav
The following 2 patches are the solution to the bug:
4d88e6f7d5ff mm/balloon_compaction: fix deflation when compaction is disabled
d6d86c0a7f8d mm/balloon_compaction: redesign ballooned pages management
Related upstream mailing list discussion:
- mm: compaction: buffer overflow in isolate_migrate
Public bug reported:
In the v3.13.0-76 kernel with KASan backported.
The following error message could be observed during the kernel
building stress test of the command: "./parallel-73670.sh -r 2 -k 40"
That means building 40 kernels in the same time with 2 rounds.
Bad access happens when we read
** Tags removed: verification-needed-trusty verification-needed-vivid
verification-needed-wily
** Tags added: verification-done-trusty verification-done-vivid
verification-done-wily
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** Description changed:
[Impact]
- The use-after-free invalid read bug, which happens in really tricky case,
- would use the numa_faults data already freed for the NUMA balance to make a
- decision to migrate the exiting process.
+ The use-after-free invalid read bug, which happens in really
** Description changed:
+ [Impact]
+
+ The use-after-free invalid read bug, which happens in really tricky case,
+ would use the numa_faults data already freed for the NUMA balance to make a
+ decision to migrate the exiting process.
+
+ The bug was found by the Ubuntu-3.13.0-65 with KASan backp
Reproducer for the bug.
** Attachment added: "kernel_panic_test.sh"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1527643/+attachment/4595998/+files/kernel_panic_test.sh
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** Description changed:
We are trying to debug the kernel using KASAN and we found that when a
VM is booting in our cloud, on the virtualised kernel, there is a use-
after-free access that should not be there.
The failing VM was running on a host with kernel 3.13.0-66-generic
(trusty)
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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Title:
use-after-free found by KASAN
Public bug reported:
The error message can be observed in the dmesg when the guest VM booted
with v3.13.0-65 with KASAN enabled.
==
BUG: KASan: use after free in blk_mq_register_disk+0x193/0x260 at addr
8801ec247400
Read of size
** Tags removed: cts
** Tags added: sts
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Title:
General protection fault on c->freelist broken with Trusty Tahr
Status in linux pac
** Description changed:
==
BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr
880dd393ecd8
Read of size 8 by task qemu-system-x86/3998900
=
** Description changed:
==
BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr
880dd393ecd8
Read of size 8 by task qemu-system-x86/3998900
=
** Description changed:
- kernel: [284190.877125]
==
- kernel: [284190.898773] BUG: KASan: use after free in
task_numa_find_cpu+0x64c/0x890 at addr 880dd393ecd8
- kernel: [284190.920765] Read of size 8 by task qemu-system-x86/39
** Attachment added: "numa_faults_use_after_free.kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1527643/+attachment/4536904/+files/numa_faults_use_after_free.kern.log
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Public bug reported:
==
BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr
880dd393ecd8
Read of size 8 by task qemu-system-x86/3998900
** Attachment added: "awk.kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1403282/+attachment/4508426/+files/awk.kern.log
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Currently, the bug cannot be reproduced in the original platform. However,
there is another platform has similar symptom. And the bug can be captured
by Kasan(Kernel Address Sanitizer) backported on the v3.13.0-52.86.
The source code:
http://kernel.ubuntu.com/git/gavinguo/ubuntu-trusty-amd64.git/l
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Title:
OSDs Linked list corruption causes kerne
** Description changed:
[Impact]
The node which mounts a ceph rbd volume causes a panic when all OSD
daemons on the all ceph nodes are restarted.
- [642981.871592] [ cut here ]
+ [642981.871592] [ cut here ]
[642981.912255] kernel BUG
if there is panics.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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Title:
OSDs Linked l
Public bug reported:
[Impact]
[Fix]
[Test Case]
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: sts trusty
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have
CONFIG_SLAB enabled. When I switched to CONFIG_SLUB, the kernel
boots. So it appears this commit is breaking kernel configurations
with CONFIG_SLAB enabled.
It bisects down to:
commit 4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77
Author: Gavin Guo
Date: Wed Jun 24 16:55:54 2015 -0700
[a...@linux-foundation.org: s/kmalloc_names/kmalloc_info/, tweak comment
text]
Signed-off-by: Gavin Guo
Acked-by: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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Title:
Fix kmalloc slab creation seque
[a...@linux-foundation.org: s/kmalloc_names/kmalloc_info/, tweak comment
text]
Signed-off-by: Gavin Guo
Acked-by: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
nd 64-bit x86 if you have
CONFIG_SLAB enabled. When I switched to CONFIG_SLUB, the kernel
boots. So it appears this commit is breaking kernel configurations
with CONFIG_SLAB enabled.
It bisects down to:
commit 4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77
Author: Gavin Guo
Date: Wed Jun 24 16:55:54
@Kamal,
Thanks for your verification. I'll modify the tag verification-needed-
vivid to verification-done-vivid.
** Tags removed: verification-needed-vivid
** Tags added: verification-done-vivid
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Hi Clsoto,
Tinoco is on vacation now, I'm his proxy. And I saw you have tested the
kernel to verify the ethtool. Really thanks for your effort to do that.
Except on thing that I saw the kernel version
Linux powerio-le13 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:13
UTC 2015 ppc64le ppc64le
** Tags removed: verification-needed-vivid
** Tags added: verification-done-vivid
** Tags removed: verification-needed-utopic
** Tags added: verification-done-utopic
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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** Tags added: utopic vivid
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Title:
support the slub_debug boot option on specific object size
Status in linux package in Ubuntu:
** Description changed:
[Impact]
slub_debug cannot work for specific kmem_cache size.
e. g. slub_debug=PU,kmalloc-1024
The slub_debug is used to enable the debugging of use-after-free, poison
overwritten, double free. And it also increases the up time of the server
when the ab
[Test case]
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Gavin Guo (mimi0213kimo)
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Title:
support the slub_debug
Public bug reported:
The slub_debug=PU,kmalloc-xx cannot work because in the
create_kmalloc_caches() the s->name is created after the
create_kmalloc_cache() is called. The name is NULL in the
create_kmalloc_cache() so the kmem_cache_flags() would not set the
slub_debug flags to the s->flags. The
** Tags removed: verification-needed-utopic
** Tags added: verification-done-utopic
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Title:
Kernel provides incomplete audit informa
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Title:
Kernel provides incomplete audit informa
Test of the following kernel fail:
linux-image-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb
linux-image-3.13.0-24-generic
linux-image-3.13.0-46-generic
linux-image-3.15.0-031500-generic_3.15.0-031500.201406131105_amd64.deb
linux-image-3.17.0-031700-generic_3.17.0-031700.201410060605_a
priority_boost = 3
disp_qos = lossless
dispatcher = /sbin/audispd
name_format = hostname
space_left = 75
space_left_action = SYSLOG
action_mail_acct = root
admin_space_left = 50
admin_space_left_action = SYSLOG
disk_full_action = SYSLOG
disk_error_action = SYSLOG
- sudo su
- # echo "lalal
ffects: linux (Ubuntu)
Importance: Undecided
Assignee: Gavin Guo (mimi0213kimo)
Status: In Progress
** Tags: cts trusty
** Attachment added: "dmesg.log"
https://bugs.launchpad.net/bugs/1403282/+attachment/4282400/+files/dmesg.log
** Changed in: linux (Ubuntu)
Assig
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
** Changed in: hwe-next
Status: In Progress => Fix Released
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** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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Title:
[Dell Inspiron 3541] USB3 stick speed drop to 480M af
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
** Tags removed: verification-done-trusty
** Tags added: verification-done
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** Changed in: linux (Ubuntu)
Status: New => In Progress
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Title:
Usb 3.0 device is recognized as usb 2.0 device on usb 3.0 po
This bug can't be fixed in Raring. As the feature is also available in
the 12.04.4, users can upgrade their kernel to use the feature.
** Changed in: linux-lts-raring (Ubuntu)
Status: New => Won't Fix
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** Changed in: hwe-next
Status: Confirmed => Fix Released
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Title:
Webcam preview have half image display and black screen in
** Tags removed: verification-needed-quantal
** Tags added: verification-done-quantal
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https://bugs.launchpad.net/bugs/1229576
Title:
Webcam preview have half image display
** No longer affects: linux-lts-quantal (Ubuntu)
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https://bugs.launchpad.net/bugs/1229576
Title:
Webcam preview have half image display and black screen in some
resolutio
** Also affects: linux-lts-quantal (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1229576
Title:
Webcam preview have half image displ
tu)
Importance: High
Assignee: Gavin Guo (mimi0213kimo)
Status: Confirmed
** Tags: blocks-hwcert-enablement
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Title:
Webca
I've tested fglrx & fglrx-updates about 3 times and each 50 reps of
suspending and resuming by fwts 2 times and manually 1 time. Both driver
cannot pass these tests. I think the suspend & resume function support
is buggy and need AMD's help.
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I've attached the dmidecode log for comparison if this platform is the
same as the one Jeff Lane tested before.
** Attachment added: "dmidecode.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1153937/+attachment/3768940/+files/dmidecode.log
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After testing the suspend-and-resume 30 times with saucy daily build
kernel which used Radeon driver by default, it succeed. And I need to
find out what's the difference between the 2 kernel.
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After rechecking with Yung and we can't assure the exact time when the
platform will be back.
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https://bugs.launchpad.net/bugs/1132640
Title:
Asus K43BR will not boot insta
I found that in the failure case, the bios was booting into the general
booting process. While the success case, the kernel was booting into the
resuming process. The failure one mentioned before can't be rebooted
using the magic key and don't have any dmesg. However, the other one
which booted int
I've tested 4 kinds of SD card. The first is U1 16GB SDHC from Toshiba
which fail to read. Secondly, class 10 SDHC 4GB from mushkin which is
the most high speed one with 25MB/s. Thirdly, class 4 SDHC from SanDisk
which has been measured 15MB/s. The last is U1 SDHC 8GB from SanDisk
which has been me
I have checked with certification team, as Some of the ASUS platforms
have been call back and also spend some time to find in the lab. There
is no K43BR in Taipei office.
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htt
** Changed in: linux-armadaxp (Ubuntu)
Assignee: Gavin Guo (mimi0213kimo) => (unassigned)
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https://bugs.launchpad.net/bugs/1034197
Title:
Out of memory er
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