@koba issue still occurs.
@Doug
rt@sys76:~$ sudo rdmsr -c -p0 0x1b2
0x3
rt@sys76:~$ sudo strace rdmsr 0x1b2
execve("/usr/sbin/rdmsr", ["rdmsr", "0x1b2"], 0x7fff4f90a298 /* 17 vars */) = 0
brk(NULL) = 0x56510cc31000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffe42320b10) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=253505, ...}) = 0
mmap(NULL, 253505, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fec43900000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360q\2\0\0\0\0\0"...,
832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0",
32, 848) = 32
pread64(3,
"\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\t\233\222%\274\260\320\31\331\326\10\204\276X>\263"...,
68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029224, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fec438fe000
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0",
32, 848) = 32
pread64(3,
"\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\t\233\222%\274\260\320\31\331\326\10\204\276X>\263"...,
68, 880) = 68
mmap(NULL, 2036952, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fec4370c000
mprotect(0x7fec43731000, 1847296, PROT_NONE) = 0
mmap(0x7fec43731000, 1540096, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x25000) = 0x7fec43731000
mmap(0x7fec438a9000, 303104, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3,
0x19d000) = 0x7fec438a9000
mmap(0x7fec438f4000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7fec438f4000
mmap(0x7fec438fa000, 13528, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fec438fa000
close(3) = 0
arch_prctl(ARCH_SET_FS, 0x7fec438ff580) = 0
mprotect(0x7fec438f4000, 12288, PROT_READ) = 0
mprotect(0x56510cbb5000, 4096, PROT_READ) = 0
mprotect(0x7fec4396b000, 4096, PROT_READ) = 0
munmap(0x7fec43900000, 253505) = 0
openat(AT_FDCWD, "/dev/cpu/0/msr", O_RDONLY) = 3
pread64(3, "\3\0\0\0\0\0\0\0", 8, 434) = 8
close(3) = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(0x88, 0), ...}) = 0
brk(NULL) = 0x56510cc31000
brk(0x56510cc52000) = 0x56510cc52000
write(1, "3\n", 23
) = 2
exit_group(0) = ?
+++ exited with 0 +++
rt@sys76:~$
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https://bugs.launchpad.net/bugs/1945221
Title:
CPU frequency stuck at minimum value..again Ubuntu 20.04.3
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